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# Math Chapter 5 Terms

a length made up of points that extends indefinitely in both directions line
a portion of a line having 2 endpoints line segment
a portion of a line having one endpoint and extending infinitely in one direction from the endpoint ray
formed by 2 rays that share a common endpoint called a vertex angle
2 lines that cross at a point intersecting lines
lines that never intersect parallel lines
an exact location in space point
intersecting lines that form 4 right angles perpendicular lines
figures that consist of curved lines or straight lines that lie on a flat surface plane figure
plane figures that begin and end at the same point closed figures
a closed figure made of only straight lines and no curves polygon
the point where 2 sides meet vertex
5 sides pentagon
6 sides hexagon
7 sides heptagon
8 sides octogon
9 sides nonagon
10 sides decagon
any quadrilateral that has only one set of opposite sides parallel trapezoid
any quadrilateral that has both sets of opposite sides parallel parallelogram
any parallelogram that has all sides equal rhombus
any parallelogram that has four right angels rectangle
any rectangle that has all sides equal square
a polygon with all sides equal equilateral polygon
a polygon with all angles equal equiangular polygon
a polygon with all sides equal and all angles equal regular polygon
polygons that have the exact same shape and size/all corresponding sides must be equal and all corresponding angles must be equal congruent
parts of the polygon that are in matching positions corresponding parts
three sides of one triangle are equal to their corresponding sides in a second triangle SSS (side side side)
two sides and the included angle of one triangle are equal to their corresponding parts in a second triangle SAS (side angle side)
two angles and the included side of one triangle are equal to their corresponding parts in a second triangle ASA (angle side angle)
polygons with same shape but different sizes, all corresponding angles are equal, corresponding sides must be proportional similar
ratio of corresponding sides between similar polygons ratio of similitude
two angles of one triangle are equal to two corresponding angles of a second triangle AA (angle angle) similar triangles
distance around the outside of a polygon perimeter
formula for perimeter of a rectangle P = 2L + 2W
formula for perimeter of a square P = 4s
formula for perimeter of a general polygon P = sum of the sides
formula for equilateral polygon P = (number of sides)(side length)
angles between 0-90 degrees acute
90 degree angles right angles
angles between 90- 180 degrees obtuse
180 degree angles straight
angles between 180-360 reflex angles
2 angles that have a common side between them and share a common vertex adjacent angles
When two lines intersect, they form 2 pairs of opposite angles called vertical angles
2 angles whose sum is 90 degrees complementary
2 angles whose sum is 180 degrees supplementary
a line that intersects two or more other lines transversal
angles between the parallel lines on opposite sides of the transversal alternate interior angles
angles outside the parallel lines on opposite sides of the transversal alternate exterior angles
angles on the same side of the parallel lines, along the same side of the transversal corresponding angles
triangle with 3 acute angles acute triangle
triangle with 1 obtuse angle obtuse triangle
triangle with 1 right angle right triangle
triangle with 3 equal sides equilateral triangle
triangle with 2 equal sides isosceles triangle
triangle with no equal sides scalene triangle
the sum of the interior angles of any triangle 180 degrees
the angle formed between an extended side and the triangle itself exterior angle
Created by: pinkhearts1018
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