Question

Two parallel lines are crossed by a transversal.

Answer 1

Part a) What is the value of a?

we know that

m∠a=$63\°$ -------> by corresponding angles

therefore

the answer part a) is

m∠a=$63\°$

Part b) What is the value of h?

we know that

m∠h+$120\°=180\°$ ---> by consecutive interior angles (supplementary angles)

m∠h=$180\°-120\°$

m∠h=$60\°$

therefore

the answer part b) is

m∠h=$60\°$

Part c) What is the value of b?

we know that

m∠b=$128\°$ -------> by alternate interior angles

therefore

the answer part c) is

m∠b=$128\°$

Answer 2

 think its a=63 mainly based upon the two llooking similar and the bottom one is 63