5-(-8)= 5+8= 13 because when the problem is subtraction you change the last number to a positive or negative
Answer:
13 cm
Step-by-step explanation:
The diagonal of a rectangle forms a right triangle; where the diagonal is a hypotenuse, and two sides of the rectangle are legs.
Using pythagorean's theorem (
), we can say:
![5^2 + 12^2 = c^2\\25 + 144 = c^2\\169 = c^2\\13 = c](https://tex.z-dn.net/?f=5%5E2%20%2B%2012%5E2%20%3D%20c%5E2%5C%5C25%20%2B%20144%20%3D%20c%5E2%5C%5C169%20%3D%20c%5E2%5C%5C13%20%3D%20c)
The hypotenuse is equal to 13cm.