plane figure a two dimensional figure. chapter 10
TRANSCRIPT
Plane figureA two dimensional figure.
Chapter 10
polygonA closed plane figure of 3 or more
line segments. They can have a different number of sides and
angles.
Chapter 10
triangleA 3 sided polygon with 3 angles.
Chapter 10
quadrilateralA 4 sided polygon with 4 angles.
Chapter 10
pentagonA 5 sided polygon with 5 angles.
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hexagonA 6 sided polygon with 6 angles.
Chapter 10
octagonAn 8 sided polygon with 8 angles.
Chapter 10
perimeterThe distance around the outside of
an object or shape.
Chapter 10
areaThe number of square units
needed to cover a plane figure without overlapping.
Chapter 10
equilateral triangleA triangle with 3 equal sides.
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isosceles triangleA triangle with 2 equal sides.
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scalene triangleA triangle with NO equal sides.
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right triangleA triangle with one right angle.
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obtuse angleAngle bigger than 90
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acute angleAngle smaller than 90
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parallelLines that are the same distance apart. Parallel lines do not meet.
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rectangleOpposite sides are same length and are parallel. It also has 4 right
angles.
Chapter 10
rectangular solidA 3-dimensional figure with six faces
that are rectangles.
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square4 sided that are the same length, opposite sides are parallel, has 4
right angles.
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parallelogramOpposite sides are the same length
and are parallel.
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cubeA 3-dimensional figure with 6
congruent square faces.
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cone3-dimensional figure with a curved
surface and a circular base which comes to a point called the vertex.
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pyramidA 3-dimensional figure with
5 faces.
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cylinderA 3-dimensional figure having two circular bases and a curved surface
connecting the two bases.
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sphereA 3-dimensional figure that has the
shape of a round ball.
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volumeThe number of cubic units needed to
fill a 3-dimensional figure or solid figure.
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cubic unitA unit for measuring volume, such as
a cubic inch or a cubic centimeter.
Chapter 10