Question

. If one exterior angle of an isosceles triangle is 110° and vertical angle is 40°. Then its interior opposite angle is 

1.50°

2.60°

3.70°

4.80°​

Answer 1

Answer :-

✏ Option.3) 70°

Calculation :-

If one exterior angle is 110, then opposite interior angle to it is of (180-110=70°)

According to the question,

Let the other interior angles be x , another is 40 & 70

The sum of the angles of the triangle is 180°.

➡x+40+70=180

➡x + 110 = 180

➡x = 180-110

➡x = 70

So, Its interior opposite angle is 70° .

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Answer 2

Given:-

• one of the exterior angle = 110
• vertical angle = 40
• triangle is an isosceles triangle

To Find:-

• interior opposite angle

Answer :-

• interior opposite angle = 70'

Explanation :-

☆ exterior angle is equal to the sum of opp. interior angle .

• let the other interior angle be x

➪40 + x = 110

➪x = 110 - 40

➪ x = 70'

☆ INTERIOR OPP. ANGLE = 70 '

Therefore :-

option 3 = 70' is correct

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