ciara180 ciara180

09-08-2018
Mathematics

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Calculate the value of the exterior angle

Calculate the value of the exterior angle class=

Respuesta :

mkryukova19 mkryukova19

09-08-2018

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.

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