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13) Determine the measurement of angles a and c.

13) Determine the measurement of angles a and c.-example-1

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Answer:

∠ A = 92° , ∠ C = 130°

Explanation:

the sum of the interior angles of a polygon is

sum = 180° (n - 2) ← n is the number of sides

here the figure has 6 sides , that is n = 6 , then

sum = 180° × (6 - 2) = 180° × 4 = 720°

sum the interior angles and equate to 720

x + 32 + 105 + 108 + 150 + 2(x + 5) + 135 = 720

x + 32 + 105 + 108 + 150 + 2x + 10 + 135 = 720

3x + 540 = 720 ( subtract 540 from both sides )

3x = 180 ( divide both sides by 3 )

x = 60

Then

∠ A = x + 32 = 60 + 32 = 92°

∠ C = 2(x + 5) = 2(60 + 5) = 2(65) = 130°

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