Question

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

Answer 1

Step-by-step explanation:

ZA + B = ZACD (Exterior angle property)

→ 2ZA = 140° (ZA = <B)

→ ZA = 70°

Hence, the measures of ZA and B are 70° and

70° respectively.

Answer 2

Answer:

An exterior angle of a triangle is equal to the sum of the opposite interior angles.

Hence, In this case ∠A and ∠B

So,

∠A+∠B=140

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as ∠A=∠B

or,2∠A=140

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∠A=∠B=70

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