Find the base of a cone made from semi circle of radius 12cm

Answer 1

If the base is a semi-circle, that means it is half a circle. The area of a circle is pi*r² (or 3.14*radius²). If the radius is 12, then plug this in for radius above. So 3.14(12)² = 452.16 cm². But if the base is a semi-circle, then divide 452.16 by 2.

So 452.16/2 = 226.08 cm².

I hope this is what you are looking for!