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Cerrena [4.2K]
3 years ago
6

A chord 20 inches long is 4 inches from the center of a circle, as shown below. What is the radius of the circle, to the nearest

tenth of an inch
A. 4.0

B. 10.7

C. 10.8

D. 11.0

E. 21.6

Mathematics
1 answer:
ratelena [41]3 years ago
4 0

Answer:

  C. 10.8

Step-by-step explanation:

The shortest distance from a line to a point is along a path at right angles to the line. That is, the segment marked 4 is a perpendicular bisector of the segment marked 20. Together with the radius (r), it makes a right triangle with legs 4 and 10. The Pythagorean theorem tells us ...

  r² = 4² + 10²

  r = √(16 +100) ≈ 10.77033

The radius of the circle is about 10.8 inches.

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1.x-7=20<br><br>2.3x+6=12x-21​
dusya [7]

Answer:

1. x=27

2. x=3

Step-by-step explanation:

<h3>the first one </h3>

let's solve your equation step-by-step.

x−7=20

Step 1: Add 7 to both sides.

x−7+7=20+7

<h3>the second one </h3>

Let's solve your equation step-by-step.

3x+6=12x−21

Step 1: Subtract 12x from both sides.

3x+6−12x=12x−21−12x

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Step 2: Subtract 6 from both sides.

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<h3 />
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