djohnson1870 djohnson1870

21-04-2020
Mathematics

contestada

The circumference of a circle is 5.7mm what is the area of the circle to 1 d.p.

Respuesta :

21-04-2020

So the area of a circle is pi x the radius squared.
To find the radius we need to half the diameter so 2.85mm
Next we need to square this so 2.85 x 2.85 = 8.1225mm
The area = pi x 8.1225
= 25.51758633mmsquared
= 25.5 mmsquared

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