Question

Find the measures of the angles of a triangle in each of the following cases :one of the angles is 140°and the other two angle are equal.​

Answer 1

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

as ∠A=∠B

or, 2∠A=140

∠A=∠B=70

Hope it helps you.......

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Answer 2

Answer:

Let both the equal angles be x.

ATQ,

x+x+140°=180°.

2x+140°=180°.

2x=180-140

2x=40°.

x=20°

So,

1st angle=140°.

2nd angle=20°.

3rd angle=20°.

Step-by-step explanation:

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