ANGLE PAIRS

A A and C are vertical anglesB C B and C are also vertical angles

D

Vertical angles are congruent.A transversal is a line intersecting two or more coplanar lines at

different points.

If a pair of parallel lines is cut by a transversal then,a. alternate interior angles are congruent.b. corresponding angles are congruent.c. alternate exterior angles are congruent.d. same-side interior angles are supplementary.

example: r

s

t Lines s and t are cut by a transversal. If m/ 1= 124o, find the measure of the other angles.

Solution:

A. drills:Give the measures of the following angles to provethat lines a and b are parallel.

angle 2 = _________ angle 3 = _________angle 4 = _________ angle 5 = _________angle 6 = _________ angle 7 = _________angle 8 = _________

Find the value of the variables.

604x – 2y4x + 2y