plz help! Can you show me how you did it step by step

Find the lengths of kite's diagonals using the Pythagorean theorem. Example: AC = sqrt( 9^{2} + 12^{2} )

When you have the lengths of both diagonals, multiply them and divide their product by two.

YES! I got it thanks that really helped!

Hello, Creampuff! Do not use the method that I gave you. See my new post.

Btw, this way is a whole lot easier.