Question

Interior and Exterior Triangle Angles

Answer 1

Sum of two interiors=exterior

$\\ \rm\bull\rightarrowtail 2x-3+2x+15=7x-18$

$\\ \rm\bull\rightarrowtail 4x+12=7x-18$

$\\ \rm\bull\rightarrowtail 3x=30$

$\\ \rm\bull\rightarrowtail x=10$

• m<GHI=2(10)-3=17