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34 terms

Geometry

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rhombus
A parallelogram with all sides the same length
rectangle
a parallelogram with four right angles
isosceles triangle
a triangle with two equal sides
parallelogram
A quadrilateral with two pairs of parallel sides
trapezoid
a quadrilateral with exactly one pair of parallel sides
square
A rectangle with all sides the same length.
vertex
The common endpoint of an angle
hexagon
a six-sided polygon
obtuse triangle
a triangle with one obtuse angle
right triangle
a triangle with one right angle
scalene triangle
a triangle with no two sides of equal length
equilateral triangle
a triangle with three equal sides
octagon
a polygon with eight sides
quadrilateral
A polygon with 4 sides
triangle
a three-sided polygon
pentagon
a polygon with 5 sides
regular polygon
a polygon with all sides and all angles equal
polygon
A closed plane figure made up of line segments
degrees
a unit for measuring angles
protractor
an instrument for drawing/measuring angles
straight angle
an angle that measures 180 degrees
obtuse angle
An angle more than 90 degrees
right angle
an angle that measures 90 degrees
angle
two rays with a common endpoint
acute angle
An angle less than 90 degrees
plane
An endless flat surface
line segment
part of a line with two endpoints
point
An exact location in space
intersecting lines
lines that cross at one point
ray
Part of a line that has one endpoint and extends forever in one direction.
line
A straight path of points that goes on forever in two directions
perpendicular lines
Two lines that intersect to form right angles
parallel lines
Lines in the same plane that do not intersect
acute triangle
a triangle with 3 acute angles