• Brainly User

This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
A.  If the third side is the longest side, then we're looking for the hypotenuse.  By definition of Pythagorean Theorem:

The square of hypotenuse is equal to the sum of the squares of the two shorter legs/sides. 

Then, with c as the hypotenuse
c² = 10² + 6²
c² = 100 + 36

 \sqrt{c ^{2} } =  \sqrt{136}
c =  \sqrt{(4)(34)}
c = 2 \sqrt{34} inches

B.  If the third side is a shorter leg, then, with b as the shorter side, and c ans the hypotenuse, then:
b² = c² - a²
b² = 10² - 6²
 \sqrt{ b^{2} } =   \sqrt{100-64}
b =  \sqrt{64}
b = 8 inches