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AlekseyPX
3 years ago
15

How do you find the are of a circle with pi?

Mathematics
1 answer:
SCORPION-xisa [38]3 years ago
8 0

Answer:

Formula: pi*r^2

Step-by-step explanation:

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consider X-axis along the east-west direction and north-south direction along Y-axis

A = magnitude of distance traveled by hiker in north-east direction = 30 kilometer

θ = angle of direction of displacement of the hiker relative to x-axis or east direction = 45 degree counterclockwise

A' = component of distance traveled by the hiker along the east direction.

Since the angle is given with the x-axis, the Sin provides the component in Y-direction. hence

Using the equation

A' = A Sinθ

Inserting the values

A' = (30) Sin45

A' = 21.2 km

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