Question

Triangle DEF has vertices located at these points:

Point D (-2, 5)

Point E (1, 5)

Point F (-2, -3)

What is the area, in square units, of triangle DEF?

Answer 1

area= 1/2*b*h
b=sqrt[(y2-y1)^2+(x2-x1)^2]
D (-2,5), E(1,5)
b=sqrt[(5-5)2+(-2-1)^2]=sqrt[0+9]=3

Answer 2

D(-2,5), F(-2,-3)
h=sqrt[(-3-5)^2+(0)]=8

Answer 3

area=1/2*3*8=12

Answer 4

so twelve?