What is the measure of angle B in a triangle ABC, where angle A measures 45Β° and angle C measures 75Β°?
+
What is the radian measure of the angle formed by a segment from the center of the unit circle to a point on the circumference that is 1/4 of the way around the circle counterclockwise?
+
What is the equation of a circle with a radius of 5 units, centered at (2,3)?