Answer:
512.45
Step-by-step explanation:
312+199.95=512.45
Answer:
not a right triangle
Step-by-step explanation:
We can use the Pythagorean theorem to see if it is a right triangle
a^2 + b^2 = c^2
15^2 + 12^2 = 21^2
225 + 144 = 441
369 = 441
This is not true so it is not a right triangle
tis always a good idea when factoring to start off with a quick prime factoring.
