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: c² = a² + b².

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.

A median is a line segment from a vertex to the midpoint of the opposite side, while an altitude is a perpendicular line segment from a vertex to the line containing the opposite side.

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

The sum of the interior angles in a triangle is always 180 degrees.

A parallelogram is a four-sided figure (quadrilateral) with opposite sides that are parallel and equal in length. Opposite angles are equal, and adjacent angles are supplementary.

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

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