Which corresponds to the perimeter of triangle ABC? A(-5, -1) B(-2, 3) C(6, -3)

Question

A) 15

B) root of 250

C) 15+root of 125

D) 125+root of 125

Answer 1

Use distance formulas between points and add them up. I'll do the first for you:

d (A to B) = sqrt( (3-(-1))² + (-2-(-5))²) = sqrt(16+9) = 5

Note that you can be less formal and just take the absolute value of the distance in x and the value of the distance in y, then pass those through the Pythagorean Theorem to get the distance from one point to another.

Good luck!

Answer 2

Why don't you use the Distance Formula to find the length of each side of the triangle, and then just add them up?