volume_mute
Find the area of the following composite shape
publish date: 2020/11/16 01:06:00 GMT+11
volume_muteUnit of measurement is cm2
Correct Answer
2015.5
Explanation
- The area of the shape composite of a single square at one side and four half circles which all have the same area on the other side or if combined they will be two circles
- Ashape = Asquare + 2 (Acircle)
- Write square area equation
- Asquare = w2
- Write circle area equation
- Acircle = πr2
- Calculate the area of the square where w = 28 cm
- Asquare = 282 = 784 cm2
- Calculate the area of the circle where r = 14 cm (half diameter of 28 cm)
- Atriangle = π * 142 = 615.75 cm2
- Calculate the area of the shape
- Ashape = 784 + 2 * 615.75 = 2015.5 cm2