SOLUTION: Confused, not sure how to find the solution. Find the area of a rectangle if three of its corners are (-0.1,-3.4), (-7.9,-3.4), and (-0.1,6.8). Thanks!

Question 136364: Confused, not sure how to find the solution.
Find the area of a rectangle if three of its corners are (-0.1,-3.4), (-7.9,-3.4), and (-0.1,6.8).
Thanks!
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
the x dimension is the difference in the first two points (where y is constant)
__ -0.1-(-7.9)=7.8

the y dimension is the difference in the 1st and 3rd points (where x is constant)
__ 6.8-(-3.4)=10.2

the area is just x times y __ 7.8*10.2

this works because the rectangle is oriented in line with the axes
__ if it were tilted, you would have to use the distance formula to find the lengths of the sides
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