tangent is the intersection of the two sides of an angle.
tangent is the intersection of the two sides of an angle.
the intersection of the two sides of an angle is called the angles?
tangent
bullet::::- the supplement of an interior angle is called an "exterior angle", that is, an interior angle and an exterior angle form a linear pair of angles. there are two exterior angles at each vertex of the polygon, each determined by extending one of the two sides of the polygon that meet at the vertex; these two angles are vertical angles and hence are equal. an exterior angle measures the amount of rotation one has to make at a vertex to trace out the polygon. if the corresponding interior angle is a reflex angle, the exterior angle should be considered negative. even in a non-simple polygon it may be possible to define the exterior angle, but one will have to pick an orientation of the plane (or surface) to decide the sign of the exterior angle measure.
angle
bullet::::- a converse of a theorem is a statement formed by interchanging what is given in a theorem and what is to be proved. for example, the isosceles triangle theorem states that if two sides of a triangle are equal then two angles are equal. in the converse, the given (that two sides are equal) and what is to be proved (that two angles are equal) are swapped, so the converse is the statement that if two angles of a triangle are equal then two sides are equal. in this example, the converse can be proved as another theorem, but this is often not the case. for example, the converse to the theorem that two right angles are equal angles is the statement that two equal angles must be right angles, and this is clearly not always the case.
theorem