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Mathematics 7 Online
OpenStudy (anonymous):

What is the area of the triangle in the diagram? I know it's 1/2 of base times height all answers have 1/2 and I use distance to find base and height but it doesn't add up 1/2 (x1-y1)(x2-y1) 1/2y1(x2-x1) 1/2(x2-x1) 1/2 square root of (x2 squared - y1 squared) (x1 squared-y1 squared)

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