Question
A triangle with vertices (3, -1), (5, 4) and (7, -1) is _____.
- right triangle
- isosceles triangle
- scalene triangle
- Equilateral triangle
Hint:
Find the side lengths of the triangle by using distance between two points formula .Now, classify the triangle by side lengths.
The correct answer is: isosceles triangle
ANS :- Option B
Explanation :-
Given,A ≡ (3,-1), B ≡ (5,4) and C ≡ (7,-1).
By using distance formula , we get
AB = 
BC = 
AC = 
As AB = BC we get the triangles ABC as an isosceles triangle
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