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Makovka662 [10]
3 years ago
15

Area of a 40cm semicircle

Mathematics
1 answer:
Aleonysh [2.5K]3 years ago
3 0
20 i think sorry if its wrong not my best subject.
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In triangle STU the measure of angle U ie 90°. TU=6.6 US=2.3 find the measure of angle S
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Answer:

70.8 to one decimal place,

or to be exact : 70.7873

Step-by-step explanation:

In right angle triangles, trigonometry functions can be used

here tan out of sin, cos ,tan seems the most appropriate

tan(x) = opposite/adjacent

tan(x) = 6.6/2.3

x = tan^-1 (6.6/2.3)

x = 70.7873

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Step-by-step explanation:

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Step-by-step explanation:

Let A = angle of elevation

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A = arctan 55/95

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