Which of the following is the area of a triangle on the coordinate plane with its vertices on the points , where ?

What is the area of a triangle on the coordinate plane with its vertices on the points ?

What is the area, to the nearest whole square inch, of a triangle with sides 12, 13, and 15 inches?

What is the area of the triangle on the coordinate plane formed by the -axis and the lines of the equations and ?

Note: Figure NOT drawn to scale.

What is the area of the above figure?

Give the area of a triangle on the coordinate plane with vertices .

Calculate the area of the triangle (not drawn to scale).

Which of the following cannot be the measure of the vertex angle of an isosceles triangle?