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Circles: radius, diameter, and touching circles
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4-point ladder

Circles: radius, diameter, and touching circles, 4-point ladder

●●○4 points, difficulty 2 of 34 pt

Two steps, or one step plus a trap.

3 in a row to finish this ladder.

0/1 solved

KA-0147

about 60s

Two circles touch on the outside. One has a radius of 3 cm and the other a radius of 5 cm. How many centimetres apart are their centres?