SOLUTION TO LAST MONTH'S QUIZ
1. 8.5 cm, 7.5 cm, 10.5 cm.
2. 14 cm, 17 cm, 19 cm, 21 cm, 22 cm.
3. 2.1 cm.
Notes
1. Suppose radii of circles with centres A, B, C are
a, b, c cm respectively.
So a + b = 16
b + c = 18
a + c = 19
Solving, a = 8.5, b = 7.5, c = 10.5
2. Solved similarly.
3. It is easily seen that IJ + KL + MN = JK + LM + NI.
So NI = IJ  JK + KL  LM + MN = 2.1
