Mathematics: Rsm homework ! me fast i m really

8) B14) C That’s all I know...

Rsm homework ! me fast i m really - id4521699, christinachavez081

ash011519

14.01.2022

Step-by-step explanation:

Consider right triangle EFD. The sum of the measures of all interior angles in triangle EFD is 180°, so

$m\angle FED=180^{\circ}-90^{\circ}-3x=90^{\circ}-3x$

Consider right triangle EBC. The sum of the measures of all interior angles in triangle EBC is 180°, so

$m\angle BCE=180^{\circ}-(90^{\circ}-3x)-90^{\circ}=3x$

Consider triangle ACD. The sum of the measures of all interior angles in triangle ACD is 180°, so

$x+8x+3x=180^{\circ}\\ \\12x=180^{\circ}\\ \\x=15$

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