. Lines Angles Triangles Quadrilaterals Circles
Geometry Guide
Jun 19, 2015
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LinesAngles
TrianglesQuadrilaterals
Circles
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PointsLine Segments
RaysLines
Intersecting LinesPerpendicular Lines
Parallel LinesSkew Lines
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A point is a precise location in space. It is labeled with a letter.
Point K
Point L
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Planes are a flat surface and they need to have 3 points.
Point A
Point B
Point C
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A line is a straight never ending thing that goes both ways.
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A line that ends on both sides.
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A line that ends at one point and keeps going on forever on the other side.
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Two lines that meet each other and keep going past each other.
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Two lines that meet in the middle and keep going but in the middle it creates four 90 degree angles.
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Two lines that never touch and go the same way.
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Lines that aren't in the same field
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acuteobtuseright
straightvertex/verticescomplementarysupplementary
vertical/oppositeadjacent
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An angle that is less that is smaller than 90 degrees.
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An angle that is over 90 degrees is the obtuse angle.
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An angle that goes directly 90 degrees.
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A straight line is 180 degrees.
Vertex/Vertices
A vertex is the middle point. Vertices is the plural of vertex.
Vertices
Vertex
Complementary
Two angles that add up to 90 degrees.
75 degrees
15 degrees
Supplementary
2 angles that add up to 180 degrees
80 degrees
100 degrees
Vertical/Opposite
Opposite sides of a shape
Adjacent
Two angles that are next to each other.
Triangles
rightobtuseacute
scaleneisoscelesequilateral
sum of internal anglesperimeter
area
Right
An right angle in one of the angles of a triangle.
Obtuse
An angle of a triangle that's bigger than 90 degrees.
acute
An angle of a triangle that is less than 90 degrees.
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A triangle that has no equal sides.
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A triangle that has two sides that are equal.
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A triangle with all equal sides.
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All of the sides that add up to 180 degrees.
150 degrees
30 degrees
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The length around a triangle
70 degrees 40 degrees
90 degrees
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The area around the triangle.
80 degrees
20 degrees
80 degrees
30 degrees
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quadrilateraltrapezoid
parallelogramrectanglerhombussquare
area of a rectanglearea of a square
area of a parallelogramarea of a trapezoid
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A shape that has 4 sides.
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A shape that has a set of parallel sides.
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A figure with 2 sets of parallel sides.
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A figure with 2 parallel sides and 4 right angles.
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A shape that has two sets of parallel sides and opposite angles.
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A figure that has 4 right angles and 2 sets of parallel sides and equal angles.
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The space in the rectangle.
10 cm
20 cm
10cm
A=240cm2
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The space inside a square.
40cm
40cm
40cm
A=1600cm2
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The space inside a parallelogram.
20m
30m
30m
20m20m
A=600m2
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The space inside a trapezoid
20 cm20 cm
20 cm
30 cm
10 cm
A=200 cm2
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chorddiameter
arcradiussector
circumferencearea of a circle
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A segment connecting 2 points on a circle
Point A
Point B
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The chord which passes through the center.
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Distance on outside edge.
AB
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Half of a diameter.
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A piece of the area.
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Distance around the circle.
C
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The space inside a circle.
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pentagonhexagonoctagon
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A shape that has 5 sides.
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A shape that has 6 sides.
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A shape that has 8 sides.
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