Question 147115
A Triancle is Isosceles if it has at least two sides that are congruent. if the vertices of a triangle are given as A (0,8), R (-4,5), and T (-1,1) determine if Triangle ART is Isosceles or not.
{{{AR = sqrt(4^2 + 3^2)}}}
AR = 5
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{{{RT = sqrt(3^2 + 4^2)}}}
RT = 5

AB = RT, so it's isosceles.