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Geometry Scrapbook. Created By : Brandon Towns. Parallel Lines. Parallel Lines are lines that never intersect. Two non-vertical lines are parallel if and only if they have the same slope. Pg.1. Two Congruent Objects. When two angles have the same measure , they are Congruent Angles. Pg.2.
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Geometry Scrapbook Created By : Brandon Towns
Parallel Lines • Parallel Lines are lines that never intersect. Two non-vertical lines are parallel if and only if they have the same slope. Pg.1
Two Congruent Objects • When two angles have the same measure , they are Congruent Angles Pg.2
Vertical Angles • Vertical Angles are the angles opposite each other when two lines cross Pg. 3
Perpendicular Lines • Two lines are perpendicular if the product of their slopes is -1. Also, the two intersecting lines form right angles. Pg.3
Intersecting Lines • Two or more lines that meet at a point are called intersecting lines. That point would be on each of these lines. In Figure 1 , lines l and m intersect at Q. Pg.4
Supplementary Lines • Two Angles are Supplementary if they add up to 180 degrees. Pg.5
Different Proportions • The relation or adaptation of one portion to another, or to the whole, as respect magnitude, quantity, or degree; comparative relation; ratio; as, the proportion of the parts of a building, or of the body. Pg. 7
Points and Lines • A point can be imagined as an infinitely small dot, a line resembles a tough string that is being stretched. • A line is a straight line.
Length and Segment • Length is a measurement of distance or dimension. • A Segment is a portion cut off from a geometric figure by one or more points, lines, or planes
Ray and Postulate • A Ray is a line which starts at a point with given coordinates, and goes off in a particular direction to infinity, possibly through a second point. • A Postulate is a statement accepted as true without proof. A postulate should be so simple and direct that it seems to be unquestionably true.
Angle and Protractor • Two rays sharing a common endpoint. Angles are typically measured in degrees or radians. • A Protractor is a circular or semicircular tool for measuring an angle or a circle.
Acute and Obtuse • A Acute Angle is an angle that has measure less than 90°. • A Obtuse Angle is an angle that has measure more than 90° and less than 180°.
Right and Straight • A Right Angle is a 90°angle. • A Straight Angle is a 180° angle.
Bisector and Complementary Angles • Bisector is a line segment, line, or plane that divides a geometric figure into two congruent halves. • Two acute angles that add up to 90°. For example, 40° and 50° are complementary.