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WITCHER [35]
2 years ago
11

How many distinct diagonals does an undecagon have?

Mathematics
1 answer:
Evgesh-ka [11]2 years ago
7 0

Answer:

-45

Step-by-step explanation:

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Find the value of x, question and choices attached above
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Answer:

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Step-by-step explanation:

<em>Look at the picture</em>.

The lines <em>l</em> and <em>m</em> are parallel, therefore alternate interior angles are congruent.

Therefore \beta=50^o

Supplementary angles add up to 180°.

Therefore

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We know: the sum of the triangle angle measures is 180°.

Therefore we have the equation:

50+2x+196-5x=180\\\\-3x+246=180\qquad\text{subtract 246 from both sides}\\\\-3x=-66\qquad\text{divide both sides by (-3)}\\\\x=22

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Step-by-step explanation:

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