triangles

May 2010
53
1
Altlanta GA

e^(i*pi)

MHF Hall of Honor
Feb 2009
3,053
1,333
West Midlands, England
http://www.usatestprep.com/modules/questions/qq.php?totalQuestions=10&condition=hardest&testid=34&strand=206# Timmy has a triangular garden, but to add the right amount of fertilizer and top-soil he needs to know the area of the garden. Which of the formulas will give him the correct answer? The dimensions of the garden are given in the diagram shown.
A)
A = (7)2(14)
B)
A = 1
2
(7)(14)
C)
There isn't enough information given on the diagram.
D)
A= 1
2
(7) (7
3
I don't understand what your answers are meant to be.

X can be found using Pythagoras and then the area found using Heron's formula

Heron's formula (stolen from Wiki)

\(\displaystyle A = \sqrt{s(s-a)(s-b)(s-c)}\) where \(\displaystyle s=\frac{a+b+c}{2}\)