Today in maths we had to find the circumference of two circles and their area, here is how I worked out both of them,
Diameter = 92cm(small)
Circumference = 92cm x 3.14 =288.88cm
Area = 92cm ÷ 2 = 46cm
46cm x 46cm x 3.14 = 6644.24sqcm
Diameter = 339cm(Large)
Circumference = 339cm x 3.14 = 1064.46cm
Area = 339 ÷ 2 = 169.5cm
169.5cm x 169.5cm x 3.14 = 90212.985sqcm
After we found the two areas we had to get the area of the big circle and subtract the area of the small circle, here is the answer,
90212.985sqcm – 6644.24sqcm = 83568.745 sq cm
Here is some more work we did on a worksheet,
