What is the surface area of each figure round to the nearest tenth if necessary

the answer is 40.

proof:

c-   36

taxicab circle radius 9 has 4(9) = 36 points

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)

answer: i believe it is c

step-by-step explanation:

because 5+4=9 so it would be 3^9