The triangle formed by the points A(2,7) B(4,-1) C(-2,6) is ?
a) congruent triangle b) right triangle
c) isosceles triangle
d) scalene triangle
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Answer:
AB = √{(2-4)^2+(7-(-1))^2} = √68
BC = √{(4-(-2))^2+ ((-1)-6)^2} = √85
AC = √{(2-(-2))^2 + (7-6)^2} = √17
Clearly, AB^2 + AC^2 = BC^2
Hence, option b is correct. It's a right angled triangle right angled at point A.
Step-by-step explanation:
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