Question

1. angle ACD is an exterior angle of ABC.
The measures of angle A and angle B are
equal. If mACD = 140°, find the
measures of the angles A and B.​

Answer 1

Answer:

20

Step-by-step explanation:

ABC is a triangle

DCB is a straight line

A+B= (180-140)÷2

       =20

Answer 2

Answer:

As we know sum of exterior angles of a triangle is equal to sum of opposite interior angles

Thus angle ACD = angle A + angle b

140 = A + B

As these two are equal angles the sum of each angle will be140/2 that is. 70 degree

Therefore the measure of both the angles will be 70 degree.

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