Geometry Ch. 5 & 6 ACT

A line that divides a segment into two equal parts at a 90-degree angle.

Segments PQ and SR are equal in length.

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

Two figures are similar if they have the same shape but not necessarily the same size, and their corresponding angles are equal.

The segment connecting the midpoints of two sides of a triangle is parallel to the third side and is half as long.

For a right triangle, the length of the hypotenuse can be found using the formula a² + b² = c², where c is the hypotenuse.

Area = 1/2 * base * height.

A median of a triangle is a line segment joining a vertex to the midpoint of the opposite side.

The length of a midsegment is half the length of the third side.

The ratios of the lengths of corresponding sides of similar triangles are equal.