### Acute Angle Theta

Illustration of acute angle theta as part of a right triangle.

### Angles Used to Illustrate Sum and Difference of Two Angles

Angles used to illustrate the sum and difference of two angles and trig identities.

### Circle With 36 degree Angles and Radius 1.5 in.

Circle with 36 degree angles marked. This diagram can be used with the following trig problem: Locate…

### Circle With a Chord of 2 ft. and a Radius of 3 ft.

Circle with chord AB=2 ft. and radius OA = 3 ft.. Triangle AOC is a right triangle. Angle AOC=half angle…

### Circle Inscribed in a Right Triangle

Illustration showing the diameter of a circle inscribed in a right triangle is equal to the difference…

### Circle With Inscribed Right Angle in Semicircle

Illustration of a circle with a right angle inscribed in a semicircle.

### Circle With a Right Triangle

Illustration where one leg of a right triangle is the diameter of a circle. The tangent at the point…

### Coordinate Axis With Angles, Lines, and Perpendiculars Drawn

Coordinate axis with angle XOP equal to theta, Θ, and angle XOQ=180 - Θ. From any point in the terminal…

### Coordinate Axis With Perpendiculars Drawn To Form Similar Right Triangles From Positive and Negative Theta, Θ

Angle XOP=Θ and angle XOQ=- Θ. From a point in the terminal side of each a perpendicular line is drawn…

### Coordinate Axis With Perpendiculars Drawn To Form Similar Right Triangles

Angle XOP=Θ and angle XOQ=90+Θ. From a point in the terminal side of each a perpendicular line is…

### Ellipse Third Method

Draftsman's third method for drawing an ellipse

### Flashcard of a Right Triangle

A flashcard featuring an illustration of a Right Triangle

### Forms

Showing different types of forms or shapes: rectangle, right triangle, acute triangle, and obtuse triangle.

### Euclid's Pythagorean Theorem Proof

Illustration used to prove the Pythagorean Theorem, according to Euclid. A perpendicular is drawn from…

### Geometric Pythagorean Theorem Proof

Illustration that can be used to prove the Pythagorean Theorem, the sum of the squares of the legs is…

### Geometric Pythagorean Theorem Proof

Illustration that can be used to prove the Pythagorean Theorem, the sum of the squares of the legs is…

### Pythagorean Theorem Proof by Rearrangement

A visual illustration used to prove the Pythagorean Theorem by rearrangement. When the 4 identical triangles…

### Pyramid Frustum With Triangular Bases and Height of 27 inches

An illustration of a pyramid with the top cut off by a plane parallel to the base. The remaining part…

### Right Triangle

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

### Right Triangle

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Right Triangle

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Right Triangle

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Right Triangle

Tangrams, invented by the Chinese, are used to develop geometric thinking and spatial sense. Seven figures…

### Right Triangle Formed by Flagpole (x feet high) and Ground With Rope (x+4 feet)

An illustration of a right triangle made up of a flagpole, rope, and the ground. Illustration could…

### Relationships In A Right Triangle

Illustration used to show "If one acute angle of a right triangle is double the other, the hypotenuse…

### Right Triangle With Sides x, 75, and 40

An illustration of a right triangle with sides, 40, 75, and x. Additional height of x is added to 75.…

### Roof With 30 degree Inclination for Trigonometry Triangle Problems

Roof with a slope of 30 degrees. Angle theta is the inclination to the horizontal of the line AB, drawn…

### Right Triangle Inscribed In A Semicircle

An illustration of a right triangle inscribed in a semicircle.

### Shapes

Four different types of forms or shapes: right triangle, isosceles triangle, rectangle, and circle.

### Two Squares With Sides of Lengths 3,4,5 Placed at Right Angles to Each Other

Two set squares, whose sides are 3,4, and 5 in., are placed so that their 4-in. sides and right angles…

### Using Proportions To Find Heights of Trees

Triangle diagram for measuring heights of trees using proportions.

### Using Proportions To Find Heights of Trees

Triangle diagram for measuring heights of trees using proportions

### Triangle With Angle of 25 ° 33' 7" and Side of 37' 7"

Right triangle with angle of 25 ° 33' 7" and side of 37' 7"

### Triangle With Angle of 29 ° 31' and Side of 24

Right triangle with angle of 29 ° 31' and side of 24.

### Drawing Triangle

Mechanical drawing triangle.

### Inclined Plane Triangle

Inclined plane using right triangle and proportions

### Right Triangle Inscribed in Semicircle Shows Mean Proportional

Right triangle inscribed in semicircle. Illustration shows that the perpendicular from any point in…

### Isosceles Triangle degrees 90, 45, 45

An isosceles triangle with angles 90, 45, 45

### Right Triangle ABC

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

### Right Triangle ABC

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

### Right Triangle ABC

Right triangle ABC with sides m,n, p and angles A, B, C labeled.

### Right Triangle ABC

Right triangle ABC with angles A, B, C labeled.

### Right Triangle

Illustration of a right triangle used to show the Pythagorean Theorem (the square of the hypotenuse…

### Right Triangle

A right triangle on a coordinate plane.

### Right Triangle with leg 13 and hypotenuse 15

Right triangle ABC with angles A, B, C labeled and leg of 13 with hypotenuse of 15.

### Right Triangle 3,4,5

Right triangle ABC with angles A, B, C labeled and sides of length 3,4, and 5

### Right Triangle For Finding Distance Across a River

Right triangle ABC with angles A, B, C to be used for finding distance across a river. This is a trigonometry…

### Inclined Plane Forming Right Triangle

Inclined plane forming right triangle showing the velocity of a body sliding a distance,s, down a smooth…

### Right Triangle OCB With, x, y, and r shown

Right triangle OCB that can be used to show the relationships between x, y, r, and Θ.

### Right Triangle Showing Pythagorean Theorem

Illustration of a right triangle that can be used to show Pythagorean theorem. "In any right triangle,…

### Right Triangle With Sides .7 and 1 and Angle of 35 degrees

Right triangle OQP with angle of 35 degrees, height of .70 inches, and leg of 1 inch.

### Right Triangle With Sides .64 and 1 and Angle of 40 degrees

Right triangle OQP with angle of 40 degrees, height of .64 inches, and hypotenuse of 1 inch.

### Right Triangle ABC With Angle 67 degrees 42.8 minutes and Hypotenuse 23.47 ft.

Right triangle ABC with a base angle of 67 degrees 4208 minutes and a hypotenuse of 23.47 ft.

### Right Triangle ABC With Leg 23.85 ft. and Hypotenuse 35.62 ft.

Right triangle ABC with a leg of 23.85 feet and a hypotenuse of 35.62 feet.

### Right Triangle With Side .024967 and Hypotenuse .04792

Right triangle with side .024967 and hypotenuse .04792.

### Right Triangle With Side 234 and Hypotenuse 308

Right triangle with side 234 and hypotenuse 308.

### Right Triangle With Sides 15 and 18

Right triangle with sides 15 and 18.

### Right Triangle With Sides 85 and 150

Illustration of a right triangle with legs labeled 150 and 85. This could be used to find the hypotenuse…