Question

Lines g,h , and I are parallel and m 1=52 what is 11
A. 38
B.52
C.128
D.138

Answer 1

∠3 and ∠11 are corresponding angle, therefore m∠3 = m∠11.

m∠1 + m∠3 = 180° → m∠1 + m∠11 = 180°

m∠1 = 52° → 52° + m∠11 = 180°     |-52° → m∠11 = 128°