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12 July, 08:29

The diagram shows a pentagon ABCDE.

Angle EAB=118

Explain how you can tell from the size of this angle that the pentagon is not regular?

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  1. 12 July, 08:53
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    Explained in step by step

    Step-by-step explanation:

    sum of Interior angles of pentagon: 180 x 3 = 540°

    Regular pentagon has 5 congruent interior angles: 540 / 5 = 108°

    If EAB = 118° then ABCDE is not regular
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