Question

60 points! Need Answer Pl
Drag a statement or reason to each box to complete this proof.
Given: Quadrilateral ABCDwith m∠A=(9x)°, m∠B=(6x)°, m∠C=(9x)°, and m∠D=(6x)°.

Prove: x = 12

Answer 1

Let's prove

Sum of all interior angles of a quadrilateral is 360°

$\\ \rm\rightarrowtail 6x+9x+9x+6x=360$

$\\ \rm\rightarrowtail 12x+18x=360$

$\\ \rm\rightarrowtail 30x=360$

$\\ \rm\rightarrowtail x=12$