What is the Area of this triangle when x=10 inches? Hint: Area= 1/2bh
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height(h) = 7x
base(b) = 4x
Since you know the value of x, you can plug it in
h = 7(10) = 70in
b = 4(10) = 40in
[tex]A = \frac{1}{2}bh[/tex]
[tex]A=\frac{1}{2} (40)(70)[/tex]
[tex]A=\frac{1}{2} (2800)[/tex]
A = 1400in²