An umbrella has 8 ribs which are equally spaced (see figure). Assuming umbrella to be a flat circle of radius 45 cm,

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An umbrella has 8 ribs which are equally spaced (see figure). Assuming umbrella to be a flat circle of radius 45 cm, find the area between the two consecutive ribs of the umbrella.[Use π = 22/7]

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There are 8 ribs in an umbrella. The area between two consecutive ribs is subtending  360o /8 = 45o  at the centre of the assi,ed flat circle.

Area between two consecutive ribs of circle        =