"Doubly oblique prism." — Hallock, 1905

Prism

"Doubly oblique prism." — Hallock, 1905

"Cathetal prisms readily yield the phenomena of total reflection as shown, and are often used when light is to be turned through a right angle." -Avery 1895

Cathetal Prism

"Cathetal prisms readily yield the phenomena of total reflection as shown, and are often used when light…

A volume of a truncated right triangular prism is equal to the product of its base by one third the sum of its lateral edges.

Truncated Right Triangular Prism for Volume

A volume of a truncated right triangular prism is equal to the product of its base by one third the…

A volume of a truncated right triangular prism is equal to the product of its base by one third the sum of its lateral edges.

Truncated Right Triangular Prism for Volume

A volume of a truncated right triangular prism is equal to the product of its base by one third the…

Illustration used to prove "Two angles whose sides are perpendicular each to each are either equal or supplementary."

Angles With Perpendicular Sides Are Equal or Supplementary Proof

Illustration used to prove "Two angles whose sides are perpendicular each to each are either equal or…

"The quartz crystals are said to be right or left handed, depending upon whether these faces are to be observed trunctuating the edges between prism and rhombohedron." — Ford, 1912

Right-handed quartz

"The quartz crystals are said to be right or left handed, depending upon whether these faces are to…

Illustration of a rectangle, which is a parallelogram with all angles right angles.

Rectangle

Illustration of a rectangle, which is a parallelogram with all angles right angles.

"If used, the Directional Arrow auxiliary sign shall be mounted below the route sign in directional assemblies, and displays a single- or double-headed arrow pointing in the general direction that the route follows." -Federal Highway Administration, 2007

Right Arrow Auxiliary, Black and White

"If used, the Directional Arrow auxiliary sign shall be mounted below the route sign in directional…

"If used, the Directional Arrow auxiliary sign shall be mounted below the route sign in directional assemblies, and displays a single- or double-headed arrow pointing in the general direction that the route follows." -Federal Highway Administration, 2007

Right Arrow Auxiliary, Outline

"If used, the Directional Arrow auxiliary sign shall be mounted below the route sign in directional…

"If used, the Directional Arrow auxiliary sign shall be mounted below the route sign in directional assemblies, and displays a single- or double-headed arrow pointing in the general direction that the route follows." -Federal Highway Administration, 2007

Right Arrow Auxiliary, Silhouette

"If used, the Directional Arrow auxiliary sign shall be mounted below the route sign in directional…

This directional arrow is used to indicate that something is located to the right.

Right Arrow, Black and White

This directional arrow is used to indicate that something is located to the right.

This directional arrow is used to indicate that something is located to the right.

Right Arrow, Color

This directional arrow is used to indicate that something is located to the right.

This directional arrow is used to indicate that something is located to the right.

Right Arrow, Outline

This directional arrow is used to indicate that something is located to the right.

This directional arrow is used to indicate that something is located to the right.

Right Arrow, Silhouette

This directional arrow is used to indicate that something is located to the right.

"Right hand rule to determine the direction of magnetic field around a conductor carrying a current. The thumb of the right hand is placed along the conductor, pointing in the direction in which the current is flowing, then...the finger tips will point in the direction of the magnetic whirls." -Hawkins, 1917

Right Hang Rule

"Right hand rule to determine the direction of magnetic field around a conductor carrying a current.…

"Right hand palm rule to determine the direction of the magnetic field around a conductor carrying a current." -Hawkins, 1917

Right Hand Rule

"Right hand palm rule to determine the direction of the magnetic field around a conductor carrying a…

"A rule for direction of induced current which in some cases, is more conveniently applied than Fleming's rule." -Hawkins, 1917

Right Hand Rule

"A rule for direction of induced current which in some cases, is more conveniently applied than Fleming's…

"Fleming's rule for direction of induced current. Extend the thumb, forefinger and middle finger of the right hand [as shown]. Place the hand [so that] the thumb will point in the direction in which the conductor moves, the forefinger in the direction of the lines of force (N to S), then will the middle finger point in the direction in which the induced current flows." -Hawkins, 1917

Right Hand Rule of Induced Current

"Fleming's rule for direction of induced current. Extend the thumb, forefinger and middle finger of…

"The palm rule for direction of induced current: If the palm of the right hand be held against the direction of the lines of force, the thumb in the direction of the motion, then the fingers will point in the direction of the induced current." -Hawkins, 1917

Right Hand Rule, Palm

"The palm rule for direction of induced current: If the palm of the right hand be held against the direction…

"Right hand rule for polarity of a solenoid: If the solenoid be grasped in the right hand, so that the fingers point in the direction in which the current is flowing in the wires, the thumb extended will point in the direction of the north pole [of the solenoid]." Hawkins, 1917

Right Hand Rule, Solenoid

"Right hand rule for polarity of a solenoid: If the solenoid be grasped in the right hand, so that the…

"Without changing the grasp of the right hand, place the piece on the right shoulder, barrel up and inclined at an angle of about 45 degrees from the horizontal trigger guard in the hollow of teh shoulder, right elbow near the side, the piece in a vertical plane perpendicular to the front." — Moss, 1914

Right shoulder, arms

"Without changing the grasp of the right hand, place the piece on the right shoulder, barrel up and…

"In any right triangle, the square described on the hypotenuse is equal to the sum of the squares described on the other two sides. If A B C, is a right triangle, right angled at B, then the square described on the hypotenuse AC is equal to the sum of the suares described on the sides A B and B C." — Hallock, 1905

Right Triangle

"In any right triangle, the square described on the hypotenuse is equal to the sum of the squares described…

"If used, the Directional Arrow auxiliary sign shall be mounted below the route sign in directional assemblies, and displays a single- or double-headed arrow pointing in the general direction that the route follows." -Federal Highway Administration, 2007

Right/ Straight Arrow Auxiliary, Black and White

"If used, the Directional Arrow auxiliary sign shall be mounted below the route sign in directional…

"If used, the Directional Arrow auxiliary sign shall be mounted below the route sign in directional assemblies, and displays a single- or double-headed arrow pointing in the general direction that the route follows." -Federal Highway Administration, 2007

Right/ Straight Arrow Auxiliary, Outline

"If used, the Directional Arrow auxiliary sign shall be mounted below the route sign in directional…

"If used, the Directional Arrow auxiliary sign shall be mounted below the route sign in directional assemblies, and displays a single- or double-headed arrow pointing in the general direction that the route follows." -Federal Highway Administration, 2007

Right/ Straight Arrow Auxiliary, Silhouette

"If used, the Directional Arrow auxiliary sign shall be mounted below the route sign in directional…

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which belongs a number of forms having some property in common. In order to classify these different crystals, the existence of certain lines within the crystal, called axes, is assumed, around which the form can be symmetrically build up. These axes are assumed to intersect in the center of the crystal, and to pass through from one side to the other." — Hallock, 1905

Second Right Square Octahedron

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which…

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which belongs a number of forms having some property in common. In order to classify these different crystals, the existence of certain lines within the crystal, called axes, is assumed, around which the form can be symmetrically build up. These axes are assumed to intersect in the center of the crystal, and to pass through from one side to the other." — Hallock, 1905

Second Right Square Prism

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which…

In Western cultures a death mask is a wax or plaster cast made of a person's face following death. Death masks may be mementos of the dead, or used for creation of portraits. It is sometimes possible to identify portraits that have been painted from death masks, because of the characteristic slight distortion of the features caused by the weight of the plaster during the making of the mold.

Shakespeare Death Mask (Right Side)

In Western cultures a death mask is a wax or plaster cast made of a person's face following death. Death…

In Western cultures a death mask is a wax or plaster cast made of a person's face following death. Death masks may be mementos of the dead, or used for creation of portraits. It is sometimes possible to identify portraits that have been painted from death masks, because of the characteristic slight distortion of the features caused by the weight of the plaster during the making of the mold.

Shakespeare Death Mask (Left Side)

In Western cultures a death mask is a wax or plaster cast made of a person's face following death. Death…

"Raise the arm laterally until horizontal; carry it to a vertical position above the head and swing it several times between the vertical and horizontal positions." &— Moss, 1914

Squads right, march

"Raise the arm laterally until horizontal; carry it to a vertical position above the head and swing…

Supplementary Angles degrees 90 and 90

Supplementary Angles 90 - 90

Supplementary Angles degrees 90 and 90

Illustration of a leaning tower with a perpendicular drawn from the top of the tower to the ground to form a right triangle.

Leaning Tower

Illustration of a leaning tower with a perpendicular drawn from the top of the tower to the ground to…

Illustration of a palm tree that is perpendicular to the ground. The tree is perfectly straight, as is the ground. This drawing could be used for shadow, proportion, trigonometric, or Pythagorean Theorem problems.

Palm Tree Perpendicular to Ground

Illustration of a palm tree that is perpendicular to the ground. The tree is perfectly straight, as…

30-60-90 Right Triangle

Triangle 30-60-90

30-60-90 Right Triangle

30-60-90 right triangle.

30-60-90 Right Triangle

30-60-90 right triangle.

Isosceles right triangle.

Isosceles Right Triangle

Isosceles right triangle.

Oblique triangle with perpendicular drawn and angle of measure 35 ° 38" given, and sides of 88' 6" and 57'. This would be used with Law of Sines Ambiguous Case.

Oblique Triangle Used For Ambiguous Case

Oblique triangle with perpendicular drawn and angle of measure 35 ° 38" given, and sides of 88'…

Oblique triangle with perpendicular drawn to form two right triangles, one with angle measuring 36 ° 3' 29" and sides 19" and 23 ".

Oblique Triangle With Perpendicular Drawn

Oblique triangle with perpendicular drawn to form two right triangles, one with angle measuring 36 °…

Right triangle with sides a, b, c and angles A, B, C labeled.

Right Triangle ABC

Right triangle with sides a, b, c and angles A, B, C labeled.

Illustration showing a right triangle (one that has one right angle).

Right Triangle

Illustration showing a right triangle (one that has one right angle).

Illustration of a right triangle with the midpoint of the hypotenuse drawn.

Right Triangle With Midpoint of Hypotenuse Drawn

Illustration of a right triangle with the midpoint of the hypotenuse drawn.

Illustration of a right triangle with one angle the double of the other.

Right Triangle With One Angle Double the Other

Illustration of a right triangle with one angle the double of the other.

Illustration showing two equal right triangles. This can be used to show that two right triangles are equal if a leg and the hypotenuse of the one are equal, respectively, to a leg and the hypotenuse of the other.

Equal Right Triangles by Hypotenuse Leg

Illustration showing two equal right triangles. This can be used to show that two right triangles are…

"Direction of the needle when placed at a right angle to the uniting wire." -Comstock 1850

Wire at Right Angle to the Uniting Wire

"Direction of the needle when placed at a right angle to the uniting wire." -Comstock 1850