In circle P, what is the measure of abc ?

180° 60° 90° 270°

Pythagorean triples are 3 whole numbers such that a^2 + b^2 = c^2
the biggest number must be the 'c' because it is across from the 90 degree angle and therefore the longest side.
6^2 + 8^2 ? =? 10^2
36 + 64 ? =? 100
100 = 100
this is true so 6,8,10 is a pythagorean triple.
5^2 + 12^2 ? =? 13^2
25 + 144 ? =? 169
169 = 169
this is true so 5,12,13 is a pythagorean triple.