geometry 1
Contains 2 sets of parallel sides
Parallelogram
Lines that stay the same distance from each other forever and never intersect.
parallel lines
1: an angle that is less than 90°
2: a triangle with all acute angles
1:acute angle
2: acute triangle
1: contains two sets of parallel sides that are congruent
2:contains two sets of parallel sides that form 90° angles
1: rhombus
2:rectangle
1:contains two sets of parallel sides that form four 90° angles
2: a quadrilateral that contains on set of parallel sides and contains two right angles
1:square
2: right trapezoid
1: an 8 sided polygon
2:a 6 sided polygon
1:octocan
2: hexagon
contains two sets of parallel sides
parallelogram
a 5 sided polygon
pentagon
an angle that is exactly 180°
straight angle
two angles that add up to 180°
supplementary angles
lines that cross at a point
intersecting lines
1: an angles that is exactly 90°
2:a triangle with one right angle
1: right angle
2: right triangle
lines that cross at a point and form 90º angles
perpendicular lines
a triangle with three equal sides
equilateral triangle
a figure has this when a line can divide it into two congruent pairs
line symmetry
a triangle with no equal sides
scalene triangle
1: a triangle with two equal sides
2: a quadrilateral that contains one set of parallel sides; also contains two opposite congruent sides.
1:isosceles triangle
2: isosceles trapezoid
1:an angle that is more than 90° and less than 180°
2: a triangle with one obtuse angle
1:obtuse angle
2: obtuse triangle
a word meaning equal or same; it is used to describe figures,sides, and angles
congruent
angles that are across from each other; they do not share a side or vertex
opposite angles
1: the angles inside of a figure; in a triangle these add up to 180°
2: the angles on the outside of a figure when the sides are extended.
1: interior angles
2:exterior angles
a point where two or more line come together; also called a corner on a polygon
vertices
a four sided polygon; angles total 360°
quadrilateral
two angles that are formed with a common side
adjacent angles
two angles that add up to 90°
complementary angles