JEE MATHEMATICS MCQ: 2D GEOMETRY SYSTEM

1 Easy

1 of 1

Application +4 | -1

The triangle with vertices

A(2,7), B(4, y)

and

C(-2,6)

is right angled at

A

View answer and explanation

Correct option: A

y=-1

Option A (

y=-1

) is correct because the product of the slopes of

AB

and

AC

must be -1 for the triangle to be right-angled at

A

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\alpha

(\alpha, 2 \alpha)

\Delta A B C

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P

2 P A=3 P B

A

(0,0)

B

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(1, \sqrt{3}),(0,0)

(2,0)

(1,5),(-3,1) \,\&\,(-2,1)

9 x^2-16 y^2-18 x+32 y-23

=0

25 x^2+9 y^2-50 x-18 y+33=0

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