For the diagram shown, select the angle pair that
represents each angle type.
Corresponding angles
1/2
3/4
5 6
7
910
1112
Alternate exterior angles
8
Alternate interior angles
Vertical angles

i can't see the picture : /

step-by-step explanation:

assume that you have 3 different side lengths.   apply the pythagorean theorem here:   square each of the two shortest sides; call them a and b, so that their squares are a² and b².   also square the longest side, calling the result c².

now, if a² + b² = c² is true, the triangle is a right triangle; otherwise it is not a right triangle.