All triangles are 180 degrees.
As many as you like because any triangle that has a 90 degree angle is always a right angle triangle.
Infinitely many.
Infinitely many. Having found one triangle, you can find infinitely many similar triangles.
60 degrees... since triangles have to have 180 degrees in total, and all sides have to be equal.
There is 180 degrees in all triangles
all triangles are 180 degrees altogether
170 degrees.
All triangles are 180 degrees.
As many as you like because any triangle that has a 90 degree angle is always a right angle triangle.
Infinitely many.
Infinitely many. Having found one triangle, you can find infinitely many similar triangles.
60 degrees... since triangles have to have 180 degrees in total, and all sides have to be equal.
say n is the number of sides in the polygon then 360/n is the number of degrees in the central angle for the triangles that make up the n-gon. then 180-(360/n) is the number of degrees in each triangle that are part of the angle counts. there are n triangles. so 180(n-2) sanity check says it works for triangles and quadrilaterals, so its probably good.
Triangles are always 180º when the angles are added up. There is no inside angle verses and outside angle.
To find interior angle measurements, you must divide the shape into triangles by drawing diagonal lines. The diagonal lines draw triangles, and the interior angle measure of triangles are always 180 degrees. The sum of interior angles of an octagon is 1080 degrees. How ever many triangles you have, multiply it by 180. See octagons in the link for more help,
All triangles have 3 interior angles that add up to 180 degrees.