# Four sides of trapezoid

In the trapezoid ABCD is |AB| = 73.6 mm; |BC| = 57 mm; |CD| = 60 mm; |AD| = 58.6 mm. Calculate the size of its interior angles.

A =  76.5803 °
B =  90 °
C =  90 °
D =  103.4197 °

### Step-by-step explanation:

$C=180-B=180-90=90\text{°}$

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