Question

What is the area of the triangle in the diagram?

Answer 1

do you know how to find distance between two points?
the base length is given by the length between (x1,y1) and (0,0)
the height length is given by length between (x2,y2) and (0,0)

Answer 2

Use the distance formula
and use the formula for the area of a triangle which is 1/2*b*h

Answer 3

the first option.