Explanation:
radius=8
θ=90 degree or 90 ×π/180 = 1.57079 approximately to 1.5708 radian
area of sector=?
area of sector =½×r ²×θ
= ½×8² × 1.5708
= 50.2656
Answer:
≈ 100.53 Km²
The area (A) of the sector is calculated as
A = area of circle × fraction of circle
= πr² ×
= π × 8² ×
= 64π × 0.5 = 32π ≈ 100.53 Km² ( to 2 dec. places )
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