What is the average of the numbers 2.1, 3.5, 1.7, and 4.3?
The average of 3.5 and 3.5 is _________
On constructing a triangle ABC, with AB = 4.3 cm, AC = BC = 5.6 cm, the distance between the points which are both equidistant from AB and AC and also 1 cm from BC is