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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

An illustration of a right triangle inscribed in a semicircle.

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

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

Triangle diagram for measuring heights of trees using proportions.

Triangle diagram for measuring heights of trees using proportions

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

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

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

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

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

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 showing the velocity of a body sliding a distance,s, down a smooth…

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

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

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

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

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

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