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fenix001 [56]
2 years ago
15

The measure of a right angle plus the measure of a right angle equals the measure of a blank angle​

Mathematics
1 answer:
d1i1m1o1n [39]2 years ago
5 0

Answer: A straight angle

Step-by-step explanation:

90 + 90 = 180

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Kiki recorded a video of her parakeet repeating phrases that she said. The video is 234 minutes long. Kiki watched the video 212
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3 years ago
Please help, i dont understand an ounce of this
nignag [31]

Let x be the length of each side of the nonagon. We then split up the nonagon into 9 congruent, isosceles triangles, each with base = x and height = 12. Then the area of each triangle is 1/2 • x • 12 = 6x, so the total area of the nonagon will be 9 • 6x = 54x.

To find x, we can use some facts from geometry and trigonometry.

• In any polygon, the sum of the measures of the exterior angles is 360°. So each of these exterior angles will measure 360°/9 = 40°.

• Exterior angles are supplementary to the interior angles. So each interior angle will measure 180° - 40° = 140°.

• Each of the 9 triangles are isosceles with base angles measuring half the interior angles of the nonagon, 140°/2 = 70°.

• Cut the triangle in half along the labeled inradius of the nonagon, which has length 12. In the resulting right triangle, we have

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and solving for x gives

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x = 24 cot(70°) ≈ 8.7

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54x = 54 • 24 cot(70°) ≈ 471.7

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