3.2 Theorems about Perpendicular Lines

Open to text p. 114 Complete the Geo-Activity

Theorem 3.1  all right angles are congruent  If m<A = 90 and m<B= 90, then

Theorem 3.2  If two lines are perpendicular, then they intersect to form four right angles.

Example 1

You Try It

Theorem 3.3  If two lines intersect to form adjacent congruent angles, then the lines are perpendicular.

Theorem 3.4 IIf two sides of adjacent acute angles are perpendicular, then the angles are complementary.

Example 2

Example 3

You Try It

Partner Practice  Text p. 117 #s 2-14 all

HOMEWORK  text p. 118 #s all