a triangle has a base of 7ft and an altitude of 15ft. find it area to the nearest tenth

a.52.5 ft2

b.53.5 ft2
c.54.5ft2
d.55.5ft2

5 answers

http://www.mathsisfun.com/area.html
i don't get it
What is the formula for finding the area of a triangle?
Right.
isnt the area of a triangle .5bh?