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Sagot :
Answer:
x = 27
Step-by-step explanation:
The sum of the interior angles of a polygon is
sum = 180° (n - 2) ← n is number of sides
Here n = 7 , then
sum = 180° × 5 = 900°
sum the interior angles and equate to 900
3x + 31 + 135 + 5x - 4 + 7x - 64 + 120 + 6x - 8 + 4x + 15 = 900 , that is
25x + 225 = 900 ( subtract 225 from both sides )
25x = 675 ( divide both sides by 25 )
x = 27
Answer:
x = 27
Step-by-step explanation:
The sum of the interior angles of a convex polygon with n sides is 180(n - 2) degrees. Here, n = 7, so the interior angle measures add up to
180(7 - 2) = 180(5) = 900 degrees.
Adding all the expressions together:
135 + (5x - 4) + (7x - 64) + 120 + (6x - 8) + (4x + 15) + (3x + 31) = 900
Simplifying,
25x + 225 = 900
25x = 675
x = 27
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