In a circle, two parallel chords of lengths 16 cm and 24 cm are 20 cm apart. Then the radius of the circle is
ΔDGH and ΔDEF are as shown below. Find the lengths of segments DG and DE are ____ respectively. (All the measures are in cm.)
The centres of two circles of radii 3 cm and 2 cm are 8 cm apart. Find the length of the common tangent.