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If m∠BEC = 9z + 45 in rhombus ABCD, find the value of z. Help me PLEASE!!!! And can you show me how you did it Please!

If mBEC 9z 45 in rhombus ABCD find the value of z Help me PLEASE And can you show me how you did it Please class=

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Banabanana
The diagonals of a rhombus bisect each other at right angles, therefore m∠BEC=90°

9z + 45 = 90
9z = 90 - 45
9z = 45
z = 45/9
z = 5
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