Geometry Facts Flashcards
A triangle that has three acute angles
Acute triangle
A triangle that has all three sides the same length
Equilateral triangle
A polygon with exactly 6 sides and 6 angles
Hexagon
a triangle that has at least two sides the same length
isosceles triangle
A triangle that has one obtuse angle
obtuse triangle
a two dimensional closed figure made with three or more straight line segments that do not cross over each other.
polygon
a triangle that has one right angle
right triangle
a triangle that has no sides the same length
scalene triangle
a quadrilateral with exactly one pair of parallel sides
trapezoid (exclusive)
a quadrilateral with at least one pair of parallel sides
trapezoid (inclusive)
a polygon with exactly 3 sides and 3 angles
triangle
lines that are always the same distance apart and never cross
parallel lines
two lines that meet to form a right angle
perpendicular lines
a quadrilateral with opposite sides parallel and equal in length
parallelogram
a quadrilateral with all sides the same length
rhombus
angle that is between 91 and 180 degrees
obtuse
angle that is exactly 90 degrees
right angle
angle that is less than 90 degrees
acute
