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3 years ago

If the area of a circle is 20.4 units squared, what is the radius?

Mathematics

1 answer:

dmitriy555 [2]3 years ago

6 0

Answer:

r = 2.55

Step-by-step explanation:

The formula for finding the radius of a circle using the area is r = √A/π

with the r being the radius. the A being the area, and the π being pi (we'll use 3.14).

So the equation should look like this:

r = √(20.4/3.14)

Find the quotient of 20.4/3.14 and round to the nearest tenth

r = √6.5

Find the square root and round to the nearest hundredth

r = 2.55

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Q7. 11.3 inches (3 s.f.)

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Q7. Please see attached picture for full solution.

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3 years ago

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zloy xaker [14]

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1. According to the angle bisector theorem, DAC = BAC

2. Same kind of goes for BC

3. X must be equal in both equations. x= 3

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4(3) +8 = 20

Hope this helped!

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2 years ago