He radius of a circle is 2 kilometers. What is the area of a sector bounded by a 45° arc?

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asked Feb 28, 2019 16.0k views

1 Answer

Axel Heer · Answer 1 · 2019-03-05T02:44:36+0000

we know that
area of a circle=pi*r²
for r=2 km
area of a circle=pi*2²-----> 12.56 km²

if 360° (full circle) has an area of---------> 12.56 km²
45°---------------------------------> x
x=45*12.56/360-----> x=1.57 km²

the answer is
1.57 km²

He radius of a circle is 2 kilometers. What is the area of a sector bounded by a 45° arc?

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