While mining, nancy found a large metal bar that contain 12 grams of copper. nancy also determined that the bar was 80% copper. what was the total weight of the metal bar in grams?

i believe the answer is the polygon, heptagon.

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)

the answer that is correct is false