Anna cuts four identical circles from a square piece of black poster board as shown. What is the area of the left over poster board? Use 3.14 for pi.
Question
Answer:
Formula for a circle: A=Pi*r^2Diameter:2ft
Radius:1ft
A=3.14*1^2
A=3.14
Multiply by 4
4 squares=12.56ft squared
Formula for a square: A=s^2
A=4^2
A= 16ft squared
To find leftover you need to subtract 12.56 ft from 16 ft to get 3.44 ft squared(A).
solved
general
11 months ago
4386