Can someone explain the Pythagorean Theorem step by step with these numbers 4, 5, 3 = right triangle
3, 6, 9 = non-right triangle
how it works I guess
3, 4, 5 -- 3a, 4b, 5c the biggest # is always c
a² + b² = c²
3² + 4² = 5²
9 + 16 = 25
9 + 16 = 25
25 = 25
yes it is a right triangle

Find the measure of the angle indicated in bold

Read the excerpt from gilgamesh: a new english version.gilgamesh backed away. he said,"how dreadful humbaba's face has become! it is changing into a thousand nightmarefaces, more horrible than i can bear.i feel haunted. i am too afraid to go on." §enkidu answered, "why, dear friend,do you speak like a coward? what you just saidis unworthy of you. it grieves my heartwe must not hesitate or retreat."

Sade bought 21 1/2 lb. of ground beef. he used 1/4 of the beef to make tacos and 2/3 of the remainder to make quarter-pound burgers. how many burgers did he make?