Question

In the figure below, mL2= 138, find mL1, mL3, and mL4

Answer 1

Explanation:

Find ∠1:

∠2 + ∠1 = 180 (angles on a straight line are supplementary)

138 + ∠1 = 180

∠1 = 42°

Find ∠4:

∠4 =∠2 = 138° (vertically opposite angles are equal)

Find ∠3:

∠3 = ∠1 = 42° (vertically opposite angles are equal)