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10 grade maths> pointA(-1,y) and B(5,7) lie on the circle...

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pointA(-1,y) and B(5,7) lie on the circle with centre O(2,-3y).Find the values of y.Hence findd the radius of the circle

divya , 11 Years ago

Grade 12

2 Answers

Ravi

OA=OB → Find the value of y from this eqn using distance formula for both OA and OB. After solving for y, Find either OA or OB to be the radius of the circle.

Last Activity: 11 Years ago

Deepak Jindal

Given, Centre of the circle is O (2, 3).A (4, 3) and B (x, 5) are two points on the circle.∴ OA = OB (Radius of the circle)Squaring on both sides, we get∴ 4 + 0 = (x – 2)2 + 4⇒ (x – 2)2 = 0⇒ x – 2 = 0⇒ x = 2Thus, the value of x is 2.

Last Activity: 9 Years ago

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