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21 Cards in this Set

  • Front
  • Back
acute angle
an angle whose measure is more than 0 and less than 90.
angle
The opening that is formed when two lines intersect.
congruent
same size and shape.
obtuse angle
an angle that is more than 90 and less tha 180.
plane
flat surface with no boundaries
polygon
a closed flat shape
quadrilateral
four sided polygon
right angle
angle with square corner ar 90.
side
a segment of a poygon
similar
same shape but not size
straight angle
angle at 180
vertex
a point of an angle, polygon, or solid
exact number
a number not rounded
round
to express a calculation
round number
a number that ends with zero
acute triangle
triangle that is less than 90
equilateral triangle
a triangle with sides the same length
isosceles triangle
triangle with two sides the same length
obtuse triangle
a triangle whose largest angle measures more than 90 less than 180.
right triangle
a triangle that measures highest 90
scalene triangle
triangle with sides of different lengths