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01-12-2017
Mathematics

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What is the area of a triangle whose vertices are R(−4, 2) , S(1, 2) , and T(−5, −4) ?

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zizoux07p0ac3m zizoux07p0ac3m

01-12-2017

I will solve it using vectors
vector(SR)=(-5,0)
vector(ST)=(-6,-6)area equals half the cross product of these vectors
A = 1/2(30-0)=15 square units

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