The figure below is a graphic that is a combination of square and sector.
Find the difference of the area of A and B.
Pi is assumed to be 3.14.
Answer
0.56 cm2
Solution
A = 4 × 4 × 3.14 × 45/360 – 4 × 4 × 1/2 × 1/2 = 6.28 – 4 = 2.28 cm2
B = 4 × 4 × 1/2 - 4 × 4 × 3.14 × 45/360 = 8 – 6.28 = 1.72 cm2
A – B = 2.28 – 1.72 = 0.56 cm2
