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36 Cards in this Set
- Front
- Back
equilateral triangle
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triangle with all three sides equal in length; all angles have the same measure
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faces
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flat surface on a
3-dimensional shape |
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pentagon
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polygon with 5 sides
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flips=reflections
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The flipping of a figure over a line so that its image is the mirror image of the original
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intersecting lines
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lines which meet or cross one another
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perimeter
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distance around a closed 2-dimensional shape
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heptagon
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polygon with 7 sides
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hexagon
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polygon with 6 sides
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edges
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line segments where two faces of a polyhedron meet
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right angle
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angle measuring 90
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cylinder
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3-dimensional shape with two circular bases that are parallel and congruent and are connected by a curved surface; a can is a cylinder
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parallel
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never meeting and always the same distance apart
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point
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an exact location in space; the center of a circle is a point
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irregular polygon
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polygon with sides of different lengths or angles of different measures
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congruent
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having exactly same shape and size
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obtuse angle
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angle measuring greater than 90 and less than 180
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perpendicular
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meeting at right angles
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polygon
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a closed, 2-dimensional figure that is made up of line segments joined end to end
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quadrilateral
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polygon that has 4 sides
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similar
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exactly the same shape but not necessarily the same size
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angle
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figure that is formed by two rays or two line segments with a common endpoint
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acute angle
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angle measuring greater than 0 and less than 90
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radius/radii
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line segment from the center of a circle to any point on the circle; also, the length of such a line segment
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cube
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a polyhedron with 6 square faces; has 8 vertices and 12 edges
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parallelogram
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quadrilateral with 2 pairs of paralles sides; opposite sides of a parallelogram are congruent
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circumference
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the distance around a circle or a sphere; the perimeter of a circle
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isosceles triangle
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triangle with at least two sides that are the same length; at least two angles have same measures
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area
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the amount of surface inside a closed boundary; measured in square units
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rectangle
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parallelgram with 4 right angles
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nonagon
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polygon with 9 sides
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degrees
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unit of measure for angles based on dividing a circle into 360 equal parts; also unit of measure for temperature
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regular polygon
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polygon whose sides are all the same length and whose angles are all equal
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cone
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a 3-dimensional shape that has a circular base, a curved surface, and one vertex which is called the apex.
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rectangular prism
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a prism whose faces (including bases) are all rectangles
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octagon
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polygon with 8 sides
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cubic units
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a unit used in measuring volume, such as cubic centimeters or cubic feet.
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