Q131
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 + cb + caThis is true only when a = b = c
So, triangle will be equilateral