Question

An exterior angle of a triangle is 115 degree and one of the interior angles is 35 degrees, what are the other two angles of the triangle?

Answer 1

Exterior angle of a triangle = sum of interior opposite angle

Let the unknown angle be x

115 = 35 + x

x = 115 - 35

x = 80°

Sum of angles in a triangle is 180°

Let the unknown angle be y

y = 180 - 80 - 35 = 65°

Answer: The other 2 angles are 80° and 65°

Answer 2

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Here is your answer

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An exterior angle of triangle is given 115°

As we know by exterior angle of triangle property ..Sum of two opposite side of angle of the triangle = exterior angle of triangle ...

So ,

Let the other angle of triangle be x

115° = x° + 35°

x = 115° - 35°

x = 80°

Therefore the other interior angle of triangle be 80°

And the third angle of
triangle be y

By angle sum property

35° + 80° + y = 180°

y = 180° - 115°


y = 65°


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