Question

?
angle a = ? <b ? relevant answers Will be reported
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Answer 1

Answer:

here angle b will be equal to. 180-170= 10 ( angle on straight line a)

using property of sum of triangle = 180

we can find angle a

= 70+10+a= 180

angle a = 100

Answer 2

a + 70° = 170° (exterior angle = sum of two opposite interior angles).

=> a= 170°-70°

=> a=100°

a+b+70°=180°(sum of all the angles of a triangle is 180°)

=>100°+b+70°=180°

=>b=180°-170°

=>b=10°

.°. a=100°, b=10°