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Calculate the value of the exterior angle

Calculate the value of the exterior angle
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5 votes
Calculate the value of the exterior angle

Calculate the value of the exterior angle-example-1
User Tasnim
by
8.3k points

1 Answer

4 votes

An exterior angle of the triangle equals to the sum opposite interior angles, so

8x+15 = (4x+5) + (3x+20)

8x +15 = 7x +25

x=10

Now, we can calculate the exterior angle.

8x+15 = 8*10 + 15 = 80+15 = 95

Answer is 95⁰.

User Lorenzo Barbagli
by
8.8k points
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