### alternating Exterior Angles

Angles developed when a transversal intersects with twolines. Alternate exterior angleslie on opposite sides of the transversal, and on the exterior ofthe space between the 2 lines.

### alternate Interior Angles

Angles developed when a transversal intersects with two lines. Alternative interior angles lie top top opposite political parties of the transversal, and on the internal of the an are between the two lines. The is, lock lie in between the 2 lines the intersect v the transversal.

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### Angle

A geometric number consisting the the union of two rays that share a usual endpoint.

### angle Bisector

A beam that shares a usual vertex with an angle, lies within the inner of the angle, and creates two brand-new angles of equal measure.

### edge Trisector

A ray, one of a pair, that shares a typical vertex with an angle, lies within the interior of that angle, and creates, v its partner, three brand-new angles of equal measure. Edge trisectors come in pairs.

### complementary Angles

A pair of angles whose measures sum to 90 degrees. Every angle in the pair is the other"s complement.

### Congruent

Of the very same size. Angles deserve to be congruent to other angles andsegments deserve to be congruent come othersegments.

### matching Angles

A pair that angles produced when a transversal intersects v two lines. Each angle in the pair is top top the same side of the transversal, however one is in the exterior that the an are created in between the lines, and one lies on the interior, in between the lines.

### Degree

A unit of measure for the size of one angle. One complete rotation is same to 360 degrees. A ideal angle is 90 degrees. One level equals ### Exterior Angle

The larger part of one angle. Were one of the light ray of an edge to it is in rotated till it met the other ray, an exterior angle is spanned by the better rotation that the two possible rotations. The measure up of an exterior edge is constantly greater 보다 180 degrees and is constantly 360 levels minus the measure of the internal angle that accompanies it. Together, an interior and exterior angle expectancy the whole plane.

### inner Angle

The smaller part of one angle, covered by the space between the beam that kind an angle. Its measure is constantly less 보다 180 degrees, and is equal to 360 levels minus the measure up of the exterior angle.

### Midpoint

The point on a segment the lies precisely halfway native each end of the segment. The distance from the endpoint that a segment come its midpoint is half the length of the whole segment.

### Oblique

Not perpendicular.

### Obtuse Angle

An edge whose measure is greater than 90 degrees.

### Parallel Lines

Lines that never intersect.

### Parallel Postulate

A postulate which says that offered a allude not located on a line, exactly one line passes v the suggest that is parallel to original line. Figure %: The parallel postulate

### Perpendicular

At a 90 degree angle. A geometric number (line, segment, plane, etc.) is constantly perpendicular to another figure.

### Perpendicular Bisector

A line or segment the is perpendicular to a segment and also contains the midpoint of the segment.

A unit for measuring the size of one angle. One complete rotation is same to 2Π radians. One radian is same to degrees.

### Ray

A part of a line with a fixedendpoint on one end that extends without bound in the other direction.

### ideal Angle

A 90 level angle. That is the angle formed when perpendicular lines or segment intersect.

### Segment Bisector

A line or segment that contains the midpoint the a segment.

### right Angle

A 180 level angle. Developed by tworays the share a typical vertex and point in opposite directions.

### Supplementary Angles

A pair of angles whose steps sum to 180 degrees. Every angle in the pair is the other"s supplement.

### Transversal

A line that intersects with two various other lines.

### Vertex

The usual endpoint of 2 rays atwhich an angle is formed.

### vertical Angles

Pairs the angles formed where 2 lines intersect. These angle are created by light ray pointing in the opposite directions, and also they space congruent. Vertical angle come in pairs.

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### Zero Angle

A zero degree angle. The is developed by 2 rays the share a vertex and point in the very same direction.