Answer:
d and a
Step-by-step explanation:
Answer: 10 - 2√21
Step-by-step explanation: I simplified your question by using an online calculator. :)
39 & —34
ATTACHED PICTURE!
I hope this helps you
not a right triangle
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
