Jane wants ice cream the ice cream shop has the above tree diagrams in the window to show customers dissolve combination of ice cream they sell

answer: 0+0=0

step-by-step explanation:

that is the only answer that can make 0

it's

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)