ash3110 ash3110

20-06-2021
Mathematics

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Pleaseee Helpp Me. If the radius a is 8.4 cm and area of sector of the circle are 15.4 cm2, calculate the angle at the centre of the circle.

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Аноним Аноним

20-06-2021

Step-by-step explanation:

let the angle be A

so A/360 x πr²= 15.4

A/360 x 22/7 x 8.4 x 8.4 = 15.4

A = 45 x 15.4 /11 x 0.3 x 8.4

A =25°

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