The area of triangle formed by joining the centres three congruent externally touching and
49,3 cm. then find the radius of c

1 thought on “The area of triangle formed by joining the centres three congruent externally touching and<br />49,3 cm. then find the radius of c”

1. Answer:

   a) 7 cm

   Step-by-step explanation:

   Let the radius of each circle be r

   The length of side of an equilateral triangle formed by the centers of three congruent externally touching circles is 2r

   The area of triangle is

   2

   1

   ×2r×2r×sin(60

   0

   )=

   3

   r

   2

   =49

   3

   ⇒r

   2

   =49

   ⇒r=7

   Therefore the radius of circle is 7cm

   So the correct option is A.

   hope it’s helpful to you!

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