If the circle x2 + y2 = 9 passesthrough (2, c) then cc is equal t… - Vidyadip

MCQ

If the circle x² + y²= 9 passesthrough (2, c) then cc is equal to:

A
$\sqrt5$
B
$\sqrt 6$
C
$\sqrt 3$
D
$\sqrt 7$

✓

Answer

$\sqrt5$

Solution:

The equation of circle x²+ y² = 9 The point is (2,c) ⟹ 2²+ c²= 94 + c² = 9

c² = 9 - 4

c² = 5

$\text{c}=\sqrt{5}$

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