Question

Pythagorean Theorem please help

Answer 1

2^2+b^2=12^2
4+b^2=144
144-4=140
√140 = √b
11.83 = b

Answer 2

The distance between the points is the hypotenuse (c). One of the lengths is a and the other is b (it doesn't matter which). Count the number of square for the two sides, square each number, add them then square root them. That is c. 

For the 1st one:
6^2 + 8^2 =c^2
36 + 64 = c^2
100 = c^2
10 = c