These are external angles, meaning they are outside the two parallel lines, as opposed to the internal angles, which are two parallel lines.
Two angles outside the parallel lines and on the same side of the transverse line are called equal outside angles. The theorem says that the external angles of the same side are complementary, that is, they have a sum of 180 degrees.
The outside angle is the angle between each side of a shape. If we define the inner corner and the outer corner, we get a straight line of 180 °. These are additional angles.
Internal corners. • a series of pairs of wedges formed by parallel lines. cut through a cross section. • Internal corners fall in parallel lines. on the same side as the cross section.
To find the value of a particular outside corner on a regular polygon, simply divide 360 by the number of sides or angles on the polygon. For example, an adjacent flat polygon, an octagon, has external angles of 45 degrees each because 360/8 = 45.
Angle of parallel lines
If two parallel lines are intersected by a transversal, the corresponding angles are congruent. If two lines are intersected by a transversal and the corresponding angles are congruent, the lines are parallel. Internal angles on the same side as the transverse direction: the name is a description of the location of these angles.
Adjacent angles are up to 180 degrees in total. (d and c, c and a, d and b, f and e, e and g, h and g, h and f are also adjacent). d and f are interior angles. These add up to 180 degrees (e and c are also inside). Two angles that add up to 180 degrees are called additional angles.
The adjective congruent fits when two shapes are equal in shape and size. If you put two congruent triangles on top of each other, they will fit together exactly. Congruente comes from the Latin verb congruere, to meet, to correspond. Figuratively speaking, the word describes something that resembles a character or type.
The alternative set of external angles states that if two parallel lines are intersected by a transverse one, the resulting alternative external angles are congruent.
Types of acute, right, obtuse, right and reflected angles
Using a protractor
If the lines AB and CD are parallel, it is clear that the internal angles are not the same, but it turns out that they are complementary, that is, their sum is 180 °. In summary: the internal angles formed by parallel lines are additions.
If the two intersecting lines are parallel lines, the following internal angles add up to 180 °.
When two parallel lines are crossed by another line (called transversal), the angles at corresponding angles are called corresponding angles. As shown in the attached annex, angles 1 and 2, 3 and 4 are corresponding angles.
The sum is always 360. Geometric proof: when all the angles of a convex polygon converge or slide together, they form an angle called the perigone, which measures 360 degrees. When the sides of the convex polygon are increased or decreased, the total external angle is always 360 degrees.