SOLUTION: Help please. A circle with center (0,0) passes through the point (3,4). What is the area of the circle to the nearest tenth of a square unit? A. 15.7? B. 25.0? C. 31.4? D. 7

Question 973595: Help please.
A circle with center (0,0) passes through the point (3,4). What is the area of the circle to the nearest tenth of a square unit?
A. 15.7? B. 25.0? C. 31.4? D. 78.5?
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
The radius of the circle is the distance from the origin to (3,4). This is 3 units in x, 4 units in y, and the distance formula (Pythagorean Theorem) is 5.
r=5; A =25* pi
From the choices above, D is the only one close, and it fits with 25 pi or 78.5 square units.
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