12. Jo's Donut Express earned $4,378 at a festival by selling chocolate or vanilla
donuts for $2 each. If they sold 978
chocolate donuts, how many vanilla
donuts did they sell?

How do you find the area of this triangle.

The radius of the base of a cylinder is 10 centimeters, and its height is 20 centimeters. a cone is used to fill the cylinder with water. the radius of the cone's base is 5 centimeters, and its height is 10 centimeters.

The length of triangle base is 26. a line, which is parallel to the base divides the triangle into two equal area parts. find the length of the segment between triangle legs.