Question 940992
Two intersecting circles of radii 10 cm and 17 cm respectively have a common chord of length 16 cm.
 Find the distance between the centers of the circles.
:
Draw this out, you can see two different right triangles are formed by:
 half the chord, (8)
 the radius to the end of the chord (10 & 17) (the hypotenuse)
 the distance from the centers to the chord. 
:
d = {{{sqrt(17^2 - 8^2)}}} + {{{sqrt(10^2 - 8^2)}}}
d = 21 cm between the two centers