The area of a triangle is found by multiplying 1/2 times the height and the base. Our formula then will look like this:
[tex] A=\frac{1}{2}(23+11)(25) [/tex] or
[tex] A=\frac{1}{2}(34)(25) [/tex] OR
[tex] A=\frac{1}{2}(850) [/tex]. This means that the area of that triangle is 425 mm squared.
