Suppose that the series cn xn has radius of convergence 15 and the series dn xn has radius of convergence 16. What is the radius of convergence of series (cn dn)xn

The sum of the angles in a triangle is 180°. this is called the angle-sum property.the sum of the lengths of any two sides of a triangle is greater than the length of the third side. similarly, the difference between the lengths of any two sides of a triangle is less than the length of the third side.the side opposite to the largest angle is the longest side of the triangle and the side opposite to the smallest angle is the shortest side of the triangle.

What? is there supposed to be more to this?

1. i flipped the image across line y=x. the figures are now mirror images.2. the 2 line segments form a 90 degree angle and meet at the same end point3.yesbecause that is a property with all reflexions.