Answer:
m∠B=79°
Step-by-step explanation:
∠A +∠B+∠C+∠D=360°
14x-11+8x+7+5x+18+10x+13=360°
37x+27=360°
37x=333
x=9
so,
m∠B=8x+9
m∠B=8×9+7
m∠B=79°
Hope it helps!
I think it is true but I am not 100% sure thought but good luck
Its C)126in I think because top base is 16, bottom base is 12 and the height is 9.
