Question

In the following ,the measure of a is
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Answer 1

Answer:

60° is the value of a....

Answer 2

Answer:

a=60

Step-by-step explanation:

180-120=60

b=60

straight lines =180 degrees

same for c, straight lines =180 degrees

180-120=60

c=60

so now there is 60 on the inside of the triangle at angles b and c.

to find a,

b+c=a

60+60=120

180-120=60

which is a, therefore a =60

hope that makes sense and that it helps