The second condition tells you that

is half the size of

, so

, which could be rewritten in several ways. In standard form, that would be

.
<h3>Answer:</h3><h3>commutative property of multiplication</h3><h3>The property used in the statement is the commutative property of multiplication.</h3>
Answer:

Step-by-step explanation:
Our equation is:

First we dritribute
Now we have, 
light terms
and we get 
45/45/90 triangles have side lengths leg/leg/leg root2
Here the leg is root 7 and the x is in the hypotenuse so x is root 7 * root 2
Simplifies to root 7*2 = root 14