Distance between two points using Pythagoras theorem
Assertion: Po...
Question
Assertion: Points A(6, 4), B(-4, -6) and C(4, 6) are such that AB =√200, BC= √208, AC= √8, Since AB+BC>AC, points A, B and C from a triangle.
Reason: If BC2=AB2+AC2, then ΔABC is a right triangle, right angled at A.
A
If both assertion and reason are true and reason is te correct explanation of assertion
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B
If both assertion and reason are true but reason is not the correct explanation of assertion.
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C
If assertion is true but reason is false.
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D
If assertion is false but reason is true.
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Solution
The correct option is B If both assertion and reason are true but reason is not the correct explanation of assertion.
Sum of the two sides is greater than third side ∴AB+BC>ACandAB+AC>BC ∵ ABC is a triangle Also BC2=AB2+AC2 (√208)2=(√200)2+√82208=200+8208=208 ∴ ABC is right angled triangle Assertion: True; Reason: True but is not the correct explanation of assertion