Given that is an isosceles triangle, in which cm and , determine the length of to the nearest decimal number.
First, draw altitude as follows:
Since is an isosceles triangle, and since
is perpendicular to , it must be
true that . Use this fact to help find in terms of .
Given that the measure of in is , solve for the
length of .
Thus, the length of to the nearest tenth of a centimetre is cm.