Plot and connect a(-1, 1), b(2,- c(-4, -3 and find the area of the triangle formed

Not drawn to scale, but it should be correct.
After connecting the three points, draw out a triangle and spot for the base and height.

In the first triangle 80+20+p=180 (since sum of all angles of a triangle is 180)so p= 80also in second triangle 55+45+q=180 (since sum of all angles of a triangle is 180)so q=80so we can conclude that p=80 degrees q=80 degrees so p=q=80 degreeshence option b is correct

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