Question

Triangle ABC has vertices at A(3 , 7), B(5, 7), and C(3, 1). Which statement proves that triangle ABC is a right triangle?

Answer 1

Explanation:

AB is a horizontal line, and AC is a vertical line.

The intersection of AB and AC is a right angle; therefore, triangle ABC is a right triangle.

Answer 2

There are no answer selections, but line x=3 is perpendicular from line y=7, so a right angle is formed as shown in the graph below.

Explanation: