The coordinates of the vertices of ∆pqr are p(-2,5), q(-1,1), and r(7,3). determine whether ∆pqr is a right triangle. show your work and explain your answer!

Solution: Yes, triangle PQR is a right angle triangle.

Explanation:

It is given that P(-2,5), Q(-1,1) and R(7,3).

Distance between two points and is given by he formula,

Use this formula to find the length of sides.

By pythagoras theorem a triangle is a right angle triangle if and only if the sum of squares of two small sides is equal to the square of the largest side.

Since the greatest side is PR.

Hence, the triangle PQR is a right angle triangle.

c > -10.55

step-by-step explanation:

60

step-by-step explanation:

every triangle measures a total of 120 degrees. you have to find angle c. we know that isosceles triangles angles are equal. 60 degrees plus 60 degrees gives you 120.