3 years ago

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

1 answer:

3 0

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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