10-1.Circle and System of Circles
hard

माना $C _{1}$ तथा $C _{2}$ क्रमशः वृत्तों $x ^{2}+ y ^{2}-2 x -2 y -2=0$ तथा $x ^{2}+ y ^{2}-6 x -6 y +14=0$ के केन्द्र हैं। यदि $P$ तथा $Q$ इन वृत्तों के प्रतिच्छेदन बिन्दु हैं, तो चतुर्भुज $PC _{1} QC _{2}$ का क्षेत्रफल (वर्ग इकाई में) है

A

$8$

B

$6$

C

$9$

D

$4$

(JEE MAIN-2019)

Solution

Since circles are orthogonal and have equal radii therefore the quadirlateral $P{Q_1}Q{C_2}$ is aspuare.

Hence area $ = 2 \times 2 = 4$sp. units.

Since circles are orthogonal and have equal radii therefore the quadrilateral $P{C_1}Q{C_2}$ is a spuare.

Hence area $ = 2 \times 2 = 4$ sq. units.

Standard 11
Mathematics

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