Given the radius and area of the circle, calculate the angle at the centre of the circle. Radius : 8.4 cm
Area of the circle : 15.4 cm^2​

Step-by-step explanation:

Given, radius r=4.2 cmradius(r)=4.2cm

Circumference of the circle =2πr

=2×

7

22

×4.2

=26.4cm

Area of the circle =πr

2

=

7

22

×4.2×4.2

=55.44cm

2

250

step-by-step explanation:

the answer is d

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