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denis-greek [22]
4 years ago
11

What is the measure of y? (Hint- find the sum of the interior angles first)

Mathematics
1 answer:
Degger [83]4 years ago
6 0

Answer:

Option A. 115\°

Step-by-step explanation:

we know that

The sum of the interior angles in a polygon is equal to the formula

S=(n-2)180\°

where

n is the number of sides of polygon

In this problem we have

n=5\ sides

substitute the value in the formula

S=(5-2)180\°=540\°

so

540\°=90\°+135\°+y\°+88\°+112\°

Solve for y

540\°=425\°+y\°

y=540\°-425\°=115\°

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