AD¯¯¯¯¯ , BD¯¯¯¯¯ , and CD¯¯¯¯¯ are angle bisectors of the sides of △ABC . CF=8 m and CD=17 m.What is DE ?Enter your answer in the box.
Accepted Solution
A:
To solve this you have to use the Pythagorean Theorem. Which is a²+b²=c² CF,CD,and DF makes a triangle Substitute it in a²+8²=17² Add a²+64=289 Subtract 64 to get a alone a²=225 Square root it a=15