The sum of the interior angles of any triangle is 180 degrees. It does not depend on which triangle we are discussing that this fact is true for all triangles. 180 degrees is a straight line.
Yes it’s the right answer, I just did it myself and I got -4
Answer:
x1 = 0
x2 = 3
Step-by-step explanation:

If that's the right equation we can now just simplify it a bit.

Cause now it becomes obvious that we can break out x and make it into a parenthesis:

And now there's two possibilities for what x could be. Either, x is 0:

Or, the parenthesis is 0, which means that x is 3 (because 3-3=0) :

So x has two answers:
x1 = 0
x2 = 3
At least I hope this was what you were looking for
Answer:
Step-by-step explanation:
the green cylinder is 20
while the purple cone is 18
which do you think is more ? :)