Trigonometry
posted by Anonymous .
The measure of one of the equal angles in an isoscles trinagle is twice the measure of the remaining angle. Determine the exact radian measures of the three angles in the triange

let the 'remaining' angle of the triangle be x radians
then each of the other angles is 2x radians
2x + 2x + x = pi radians
x = pi/5 radians
then the "exact" measures of the three angles are
pi/5, 2pi/5 and 2pi/5