Question

What is the area of the triangle whose vertices are X(−5, −1)X(−5, −1) , Y(−5, −10)Y(−5, −10) , and Z(−9, −7)Z(−9, −7) ?



Enter your answer in the box

Answer 1

First way, plot and draw. Then draw a rectangle surround it. You will be able to find the area by subtracting the pieces from the big rectangle.
Second way, use determinant of matrix.