Geometry Flashcards
Goes forever in both directions.
Line
starts at a point and goes on forever in one direction
ray
has a starting and ending point
segment
two lines that will never intersect
parallel lines
triangle – all sides are different lengths
scalene triangle
triangle – 2 or more sides are the same lengths
Isosceles triangle
triangle – all sides are equal lenths
Equilateral triangle
Angle – less than 90 degrees
Acute Angle
Angle – more than 90 degrees
Obtuse
Angle – exactly 90 degrees
Right Angle
Triangle – contains three acute angles
Acute Triangle
Triangle – contains one obtuse angle
Obtuse Triangle
Triangle – contains one right angle
Right Triangle
closed shape with straight sides that do not cross
Polygon
a polygon where all the sides and angles are of equal measure
Regular Polygon
a four-sided polygon
Quadrilateral
a polygon that contains 2 sets of parallel sides
Parallelogram
a quadrilateral that contains exactly 1 set of parallel sides
Trapezoid
a quadrilateral that has 2 sets of parallel sides and all sides are equal measure.
Rhombus
