ACT Math Geometry

The Pythagorean Theorem states that in a right triangle, the square of the length of the hypotenuse (c) is equal to the sum of the squares of the lengths of the other two sides (a and b). Formula: a² + b² = c².

The area of a triangle can be calculated using the formula: Area = 1/2 * base * height.

The circumference (C) of a circle is calculated using the formula: C = 2πr, where r is the radius.

Similar triangles are triangles that have the same shape but may differ in size. Their corresponding angles are equal, and their corresponding sides are in proportion.

The radius is the distance from the center of a circle to any point on its circumference, while the diameter is the distance across the circle through the center, equal to twice the radius.

The volume (V) of a rectangular prism is calculated using the formula: V = length * width * height.

Complementary angles are two angles whose measures add up to 90 degrees.

A polygon is a closed figure formed by a finite number of straight line segments connected end to end. Examples include triangles, quadrilaterals, and pentagons.

The area (A) of a circle is calculated using the formula: A = πr², where r is the radius.

Congruent figures are figures that have the same shape and size. They can be superimposed on each other.