Download parallelogram

Geometry
Review
Katie Smith © 2012
Quadrilaterals
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What does “Quad”
mean?
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Quad means
4
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How many sides does a
quadrilateral have?
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A quadrilateral has 4
sides!
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These are all quadrilaterals!
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Kinds of quadrilaterals –
see if you can name
them!
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p__________
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parallelogram
two sets of parallel sides
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r______
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rhombus – all the sides are
equal in length
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t________
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trapezoid –
only one pair of parallel sides
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s_____
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square – has right angles and
ALL sides are the same length
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r________
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rectangle
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Other important
polygons you need to
know
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p_______
Hint: think
about
pentominoes
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PENTAGON
Five sides, five angles
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o______
Hint: an
octopus has 8
legs
Eight sides, eight angles
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OCTAGON
Eight sides, eight angles
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h______
Hint: Six has
an X – so does
the name of
this shape.
Six sides, six angles
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HEXAGON
Six sides, six angles
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Points, Lines,
and Segments
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p____
A
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point
A
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l___
B
C
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line
B
C
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l___ s_______
K
S
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l___ s_______
K
S
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line segment
K
S
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r__
S
L
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ray
S
L
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p _ _ _ _ _ _ _ lines
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parallel lines
two lines that will never cross
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i _ _ _ _ _ _ _ _ _ _ _ lines
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intersecting lines
lines that will cross if extended
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p _ _ _ _ _ _ _ _ _ _ _ _ lines
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perpendicular lines
lines that cross to form right angles
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Angles
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o _ _ _ _ _ angle
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obtuse angle
bigger than a right angle – more than 90 degrees
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a _ _ _ _ angles
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acute angles
are smaller than a right angle – less than 90 degrees
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r _ _ _ _ angles
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right angles
look like the letter L and are 90 degrees
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Perimeter
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Think of Jurassic Park:
“Secure the Perimeter!”
means get the fences
ready!
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Perimeter = the measurement
All the way around an object
*Add all the sides to find the
perimeter!
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What is the perimeter of the
triangle?
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P=13 inches!
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Area
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Area is the
measurement inside
of an object.
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Find the area by multiplying the sides.
length x width = l x w
What is the area of this rectangle?
7 in.
4 in.
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Find the area by multiplying the sides.
length x width = l x w
What is the area of this rectangle?
7 in.
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4 in.
A=28
square
inches
7x4=28
What is the area of this square?
5 ft.
5 ft.
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What is the area of this square?
5 ft.
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5 ft.
Area=25
square
feet
5x5=25
What is the area of this rectangle?
7 in.
3 in.
3 in.
7 in.
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What is the area of this rectangle?
7 in.
7 in.
3 in.
3 in.
Area=21
square
inches
7x3=21
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Good job
Mathematicians!!!
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