Question

two concentric circles of radii 12 cm and 5 cm are
drawn. a chord of bigger circle becomes a tangent of
the smaller circle. then the length of this chord is
A. 26 cm
B. 17 cm
C. 13 cm
D. 7 cm

Answer 1

Answer:

26

Step-by-step explanation:

Radius of big circles =one side of the triangle = 12 cm

Radius of small circle = another side of triangle =5cm

half of the chord is hypotenuse of triangle = x

12^2 + 5^2 = x^2

√144 + 25 = x

√169 = x

x = 13

2x = chord

2×13 = 26 cm

Answer 2

Answer:

26

Step-by-step explanation:

if you take half triangle

then,

by Pythagoras theorem you get solution

please mark as brainlist