Transcript Document 7113723

Plane figure
A two dimensional figure.
Chapter 10
polygon
A closed plane figure of 3 or more
line segments. They can have a
different number of sides and
angles.
Chapter 10
triangle
A 3 sided polygon with 3 angles.
Chapter 10
quadrilateral
A 4 sided polygon with 4 angles.
Chapter 10
pentagon
A 5 sided polygon with 5 angles.
Chapter 10
hexagon
A 6 sided polygon with 6 angles.
Chapter 10
octagon
An 8 sided polygon with 8 angles.
Chapter 10
perimeter
The distance around the outside of
an object or shape.
Chapter 10
area
The number of square units
needed to cover a plane figure
without overlapping.
Chapter 10
equilateral triangle
A triangle with 3 equal sides.
Chapter 10
isosceles triangle
A triangle with 2 equal sides.
Chapter 10
scalene triangle
A triangle with NO equal sides.
Chapter 10
right triangle
A triangle with one right angle.
Chapter 10
obtuse angle
Angle bigger than 90
Chapter 10
acute angle
Angle smaller than 90
Chapter 10
parallel
Lines that are the same distance
apart. Parallel lines do not meet.
Chapter 10
rectangle
Opposite sides are same length
and are parallel. It also has 4 right
angles.
Chapter 10
rectangular solid
A 3-dimensional figure with six faces
that are rectangles.
Chapter 10
square
4 sided that are the same length,
opposite sides are parallel, has 4
right angles.
Chapter 10
parallelogram
Opposite sides are the same length
and are parallel.
Chapter 10
cube
A 3-dimensional figure with 6
congruent square faces.
Chapter 10
cone
3-dimensional figure with a curved
surface and a circular base which
comes to a point called the
vertex.
Chapter 10
pyramid
A 3-dimensional figure with
5 faces.
Chapter 10
cylinder
A 3-dimensional figure having two
circular bases and a curved surface
connecting the two bases.
Chapter 10
sphere
A 3-dimensional figure that has the
shape of a round ball.
Chapter 10
volume
The number of cubic units needed to
fill a 3-dimensional figure or solid
figure.
Chapter 10
cubic unit
A unit for measuring volume, such as
a cubic inch or a cubic centimeter.
Chapter 10