the angle in a rectangle is 90 degress angles in a equilateral triangle is 60 degree each. in this question they usually give you the triangle at an angle and give you what the angle is. so if you add them together they should all add to 90 degrees. so basically the trick is in what type of triangle it is.
The scalene triangles are weird because they are defined by what they aren't. The inside angles of a scalene triangle are always all different. If all three angles are different, then the triangle is scalene, and all the sides are different lengths. Imagine two angles are the same. The triangle would then be an Isosceles triangle, which has two sides the same length. If all three angles are the same, it would be an equilateral triangle and all three sides would be the same length.
No right triangle can have any obtuse angles inside it.
As with any triangle, inside the triangle.
-- In any triangle, the three inside angles always add up to 180 degrees. -- In an isosceles triangle, two of the three inside angles are equal.
The 3 inside angles of any triangle add up to 180 degrees.
The 3 inside angles of any triangle add up to 180 degrees
inside the triangle ;) hope this helps!!
The 3 interior angles of any triangle add up to 180 degrees
The 3 inside angles of a triangle add up to 180 degrees
A triangle has 3 inside angles that add up to 180 degrees
The sum of the angles inside a triangle is 180 degrees.