The area of a sector of a circle with radius 4 cm and central angle 45o is:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 2π cm2
Area of sector = (θ ÷ 360) × π × r2
= (45 ÷ 360) × π × 42
= (1 ÷ 8) × π × 16
= 2 × π
= 2π cm²