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Mathematics

Grade9

Easy

Question

A stop sign is a regular geometric figure. What is the measure of the central angle of the stop sign?

30
45
48
135

hint Hint:

Angle is a figure which is formed when two rays meet at a common point. Angles can be of many types one of them is central angles. Central angle is formed when two radii of a circle meet at the centre the circle. Central angle of a regular polygon can be determined by using the formula $fraction numerator 360 over denominator N o. space o f space s i d e s end fraction$ . Here, we have to find the central angle of the given regular polygon.

The correct answer is: 45

In the question there is an image of stop sign board using which we have to find the central angle of the stop sign board.
Central angle = $fraction numerator 360 over denominator N o. space o f space s i d e s end fraction$
= $fraction numerator 360 over denominator 8 end fraction$
= $45 degree$
So, the central angle of the stop sign board is $45 degree$ .
Therefore, the correct option is b, i.e., $45 degree$ .

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