Question

A regular 20-gon with sides of length 4 units can be divided into 20 equilateral triangles with sides of length 4 units. The area of the 20-gon is ______. (Give the exact form of the answer.)

Answer 1

well calculate the area of one of the triangles then multiply that area by 20

Answer 2

you could just use the formula Area of a twentygon = (Base*height/2)*20

Answer 3

Area of a twentygon = (Base*height/2)*20=160

Answer 4

4*4/2 *(20)= 16/2*(20)= 8*(20)=160