egment EA is an altitude of triangle DEF. Find the area of the triangle.

Triangle DEF with altitude AE is shown. Point D is at negative 2, 1. Point E is at 2, 5. Point F is at 6, 1. Point A is at 2, 1.

14.5
15
15.5
16

Question

egment EA is an altitude of triangle DEF. Find the area of the triangle.

Triangle DEF with altitude AE is shown. Point D is at negative 2, 1. Point E is at 2, 5. Point F is at 6, 1. Point A is at 2, 1.

 14.5
 15
 15.5
 16

anonymous · Answer

attachment

darthvader2900 · Answer

http://openstudy.com/study#/updates/53d67cb0e4b0f2f7e5e9fd3b

darthvader2900 · Answer

thank you for medal :D

jdoe0001 · Answer

get the length of EA   = height
get the length of DF  = base

and use the area of a triangle formulat = $\bf \cfrac{1}{2}base\cdot height$