Q198
Length of the sides of a triangle are a, b and c respectively. If a2 + b2 + c2 = ab + bc + ca then the triangle is
A.
isosceles
B.
equilateral
AnswerC.
scalene
D.
right-angled
Answer: Option B
Solution
Answer: Option B
Solution:
a2 + b2 + c2 = ab + bc + caThis is true only when a = b = c
So, triangle will be equilateral.