Question

please help me out, thanks in advance

Answer 1

diagnols of rect are equal and bisect each other

AC = BD

1/2 AC = 1/2 BD

AE = DE

3x-28 = 1/2x + 12

3x-28= ( 24+x) / 2

6x-56 = 24 + x

5x = 80

x = 16

clearly AC = 2AE = 2 (3x-28)

= 2(20)

=40

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