Determine the number of sides of a polygon whose exterior and interior angles are in the ratio 1:5
Answers
Step-by-step explanation:
x+5x=180°
6x=180°
x=30°
5×30°=150
360°/ interior angle
no.of sides of a polygon =360°/30°= 12 answer
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Answer:
12
Step-by-step explanation:
Step 1: Find interior and exterior angle using sum of interior and exterior angle.
We know that the sum of one exterior angle and one interior angle is 180°
as they form a linear pair. Now lets say that the exterior angle is x.
And it is given that the interior angle are in the ratio 1:5
∴ the interior angle measure will be 5x
Now,
⇒x+5x=180°
6x=180°
x=30°
Step 2: Find the number of sides using the sum of exterior angle
Now, the sum of exterior angle in polygon =360°
Let the number of sides be ′n′
∴n×x=360°
n×30°=360°
n=12
∴ The number of sides are 12
Hence, the answer is 12.
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