AB = 20 cm,m of angle A , and m of angle C = 45 degrees. Express the number of centimeters in the length of in simplest radical form.
+36916 Express the number of centimeters in the length of ??? in simplest radical form.
What is ??? You accidentally omitted it! 
......and did you mean to say m of A is 45 also? Does not look like it from diagram....
