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Find the value of x.3xX + 10Х2xx = [?]Hint: Sum = (n-2)180Enter

Sagot :

we know that

The sum of the interior angles in any polygon is equal to

S=180(n-2)

where

n is the number of sides

In this problem we have a quadrilateral

so

n= 4 sides

substitute in the formula

S=180(4-2)

S=180(2)

S=360 degrees

That means

3x+x+2x+x+10=360

solve for x

7x+10=360

7x=350

x=50 degrees

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