math
posted by charles .
In isosceles right triangle ABC, point D is on hypotenuse BC such that AD is an altitude of triangle ABC and DC = 5. What is the area of triangle ABC?

math 
Steve
well, ADB is also an isosceles right triangle with sides of 5.
So, its hypotenuse is AB = 5√2
that help? 
math 
Julie
Please, just help solve it, and don't give a tip. I still don't follow this.

math 
Sarah
I solved it by myself . . . thanks fir the little tip. The answer is 25.

math 
Julie
Thanks!
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