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Alenkinab [10]
3 years ago
13

DE is tangent to Circle C at point D. What is the measure of Enter your answer in the box.

Mathematics
1 answer:
creativ13 [48]3 years ago
5 0

Answer:

39°

Step-by-step explanation:

A radius of a circle (segment CD) drawn to the point of tangency (D) intersects the tangent (line DE) at a 90-deg angle.

That makes m<D = 90.

m<D + m<C + m<E = 180

90 + 51 + m<E = 180

m<E = 39

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Andreas93 [3]
It should be 11. hope this helps :)
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3 years ago
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Karen measures the width of a garden plot and records that it is 44.25 meters. Its actual width is 45.5 meters.
vazorg [7]

Answer

Find out the what is the percent error in the measurement, to the nearest tenth of a percent .  

To prove

Formula

Percentage\ error = \frac{error\times 100}{exact}

Where error = | Approx - Exact |

As given

Karen measures the width of a garden plot and records that it is 44.25 meters. Its actual width is 45.5 meters.

Approx value = 44.25 meters    

Actual value = 45.5 meters        

error = | 44.25 - 45.5 |

         = |-1.25|

         = 1.25

Put in the formula

Percentage\ error = \frac{1.25\times 100}{45.5}

Percentage\ error = \frac{125}{45.5}

Percentage error = 2.7%

Therefore the percentage error is 2.7% .




3 0
3 years ago
(1) the diameter is 20 inches whats the radius? And whats the circumference?
Alecsey [184]

(1) the diameter is 20 inches whats the radius? And whats the circumference?

Radius is half the diameter, Answer: 10 inches

Circumference is pi times the radius, Answer: 10π inches

I won't bother with the approximation, though this one is easy, 31.4159 inches.  I'll leave the rest of the calculator work to you if necessary.

(2) the diameter 11 inches whats the radius? And whats the circumference?

Radius half, Answer: 5.5 inches.   Circ: 5.5π inches

(3) the diameter 3.5 inches whats the radius? And whats the circumference?

Radius, 1.75 inches.  Circ: 1.75π inches

8 0
2 years ago
FIRST ANSWER GETS BRAINLIEST!!!
maksim [4K]

I believe it is A and C.

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I hope this helps!!!

8 0
3 years ago
Hey guys! Can u help me with these three questions?
Margaret [11]
Hey guys it equals 12 alight
5 0
2 years ago
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