The area of the triangle with vertices (-1,-8), (-1,1), and (5,1)

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Question from jimmy, a student:

find the area of a triangle whose vertices are
(-1,-8), (-1,1), and (5,1)

Hi Jimmy,

One expression for the area of a triangle is half the length of the base times the height.

Plot the three points and draw the triangle. Do you see anything special about this triangle?

Penny

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