units. To calculate this value yourself, follow these steps:
Evaluate the absolute value of the expression |(1)×(1−5)+(−1)×(5−2)+(0)×(2−1)| = |−4−3+0| = 7.
Divide this value by 2 to get 7/2 = 3.5.
Verify this result using our area of a triangle with the coordinates calculator.
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