180 degrees. Triangles always have an interior of 180 degrees and quadrilaterals have 360 degrees.
interior is the inside of a triangle but is connected to the triangle.
180 degree.
2
The 3 interior angles of any triangle add up to 180 degrees
The sum of the interior angles in a triangle is 180 degrees
An interior angle is any angle on the interior of the triangle.
3Same answer with an explanation:In an equilateral triangle, all sides are the same length and all three interior angles have the same number of degrees (60 degrees each).
A triangle with a 90o interior angle is called a 'right' triangle. BTW, any triangle can have only one 90o interior angle
Any number you like.
None because a scalene triangle has three unequal sides.
An Acute Triangle
A heptagon. It can have a reflex interior angle, a triangle cannot.