The cone and the cylinder below have equal surface area.
3r
27

Which is an equation for the nth terms of the sequence 12,15,18,21

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle