The formula to find the measure of an interior angle is

, where

represents the number of sides in the polygon. In this problem,

would represent

.
Let's plug in the value for


Let's simplify that.

Now we know that the <span>measure of an interior angle of a regular three-sided polygon is 60</span>°.
Your answer would be B!Let me know if you have any questions regarding this problem!
Thanks!
-TetraFish
Answer: 0.27
You can mark me brainliest on the other question you know
Step-by-step explanation:
Answer:
Fraction: 1/2
Precentage: 50%
Step-by-step explanation:
5 and 12.
5 + 7 is 12 and 5 multiplied by 12 is 60