2016-09-23 13:32:54
if a square has a diagonal length of 5 square root 2 inches whats is the area of the square
2016-09-23 16:45:09

The diagonal of the square creates two congruent right triangles, which you could see if you drew a picture. The diagonal is the hypotenuse of the triangle, and the sides of the square are the legs of the triangle. Again, a diagram might help. The pythagorean theorem is (a^2)+(b^2)=(c^2), where c is the hypotenuse and a and b are the legs. We know that c is 5 square root of 2, so: (a^2)+(b^2)=((5 square root of 2)^2), Now, distribute the square (exponent of 2) to both the 5 and the square root of 2. Squaring and the square root cancel each other out, leaving us with 2. 5^2 is 25. Then, both of those are multiplied together, so: (a^2)+(b^2)=50 Since we are dealing with a square, both side lengths are the same, so a and b are the same number. So, we have two of the same term being added to each other. To eliminate any confusion, let x stand for the length of the sides of the triangle. This is equivalent to: 2(x^2)=50. Then, we just solve for x. (x^2)=25 x=5 All sides of the triangle are 5. So, the area is 5*5, or 25 inches.