Question

PLEASE HELP!!
Please also explain your answer so I'll know how to solve next time

Answer 1

D=121

Explanation:

First fin the angles on the inside using the outer angles. Always use 180 as your main number to subtract from. 180-131 = 49 180-108= 72 72+49=121

180-121=59 180-59=121

Or an easier way is to see if your outer angles equal up to 360

So 131+108=239

360-239=121

And there's your solution.