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geometry
definitions
14
Mathematics
5th Grade
11/07/2013

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Cards

Term
Obtuse angle
Definition
  • an angle that has a measure greater than 90 degrees and less than 180 degrees
Term
Acute angle
Definition
  • an angle that has a measure greater than 0 degrees and less than 90 degrees.
Term
Straight angle
Definition
  • an angle that measures 180 degrees.
Term
reflex angle
Definition
  • an angle that has a measurement greater than 180 degrees and les than 360 degrees.
Term
radius
Definition
  • a line segment from the center of a circle to any point on the circle
Term
diameter
Definition
  • a line segment that passes through the center of a circle and has endpoints on the circle
Term
verticle angle
Definition
  • when two lines intersect, the angles that do not share a common side. Sometimes referred to as opposite angles.
Term
adjacent angles
Definition
  • angles that are next to each other
Term
equilateral triangle
Definition
  • a triangle with all three sides equal in length
Term
isosceles
Definition
  • a triangle with at least two sides that are the same length
Term
convex polygon
Definition
  • a polygon in which all vertices are "pushed outward."
Term
concave polygon
Definition
  • a polygon in which at least one vertex is "pushed in."
Term
congruent
Definition
having exactly the same shape and size
Term
vertex
Definition
the point where the line segments meet.
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