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Ivanshal [37]
3 years ago
14

The perimeter of a semicircle is 51.4 meters. What is the semicircle's radius? Use 3.14 for ​.

Mathematics
1 answer:
Vadim26 [7]3 years ago
3 0
The radius is 8.31 cm long
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Find the measure of angle 4 AND...… angle 7
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Answer:

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Step-by-step explanation:

Remark

There are only 2 answers to this question. <4 has one of them and <7 has the other one. <7 is acute. <2 is obtuse.

Givens

<2 = 55 degrees

Solution

<4 is the supplement of <2

Therefore <4 + <2 = 180                     A straight line has an angle of 180°

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<4 = 180 - 55

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So <7 is either 55 or 125. Since <7 is acute, it is 55 degrees but we have another way of proving it.

<4 + <6 = 180 degrees            Interior angles on the same side of the transversal are supplementary

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<6 = 180 - 125

<6 = 55

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<7 = 55 degrees.

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