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31-10-2019
Mathematics

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quadrilateral ABCD is a square. if m

quadrilateral ABCD is a square if m class=

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31-10-2019

The answer is B. 18

Explanation:

We know that a square has 4 right angles. A right angle is 90°.

5x° = 90°
5(18)° =90°
90°=90°

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