The Vertices of a Triangle Are Given

Multiple Choice

The vertices of a triangle are given. Use the distance formula to find what kind of triangle each is. A sketch of the graph might be helpful. Note: An isosceles triangle has two equal sides. An equilateral triangle has three equal sides. A right triangle satisfies the Pythagorean Theorem.
(4, 8) , (1, 6) , (5, 0)

A) isosceles equilateral
B) isosceles right
C) right, not isosceles
D) equilateral
E) isosceles