Answer:
Step-by-step explanation:
It will help to redraw the triangle to scale! If AD is 7 and AC is 14 and DB is perpendicular to AC, the solution becomes pretty obvious.
The given right angles are a clue.
BD must also be 7.
X^2 = 7^2 +7^2.
I hope you can take it from here. This phone keypad doesn't have a radical!
You should end up with x equals 7 times the square root of 2.
