VSA2 marksYear: 2024EasyCBSE Class 10
coordinate-geometrydistance-formulaisosceles-triangle
Question
Prove that the points (3,0), (6,4) and (−1,3) are the vertices of an isosceles triangle.
Solution
1
Let A(3,0), B(6,4), C(−1,3)
+0.5 marks2
AB=(3−6)2+(0−4)2=9+16=5 +0.5 marks3
BC=(6+1)2+(4−3)2=49+1=50 +0.5 marks4
CA=(−1−3)2+(3−0)2=16+9=5. Since AB=CA, △ABC is isosceles. +0.5 marks