Geometry

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Geometry
Angles Acute, Obtuse, Straight, Right Angle
Pairs Congruent, Vertical, Adjacent,
Complementary and Supplementary Lines Parallel,
Perpendicular, Intersecting Triangles Side
Classification
Angle
Classification. Polygons Congruent
Figures/Similar Figures Symmetry Circles Translati
on, Rotation, Reflection
Basic Geometry Terms Point Line Ray Line
Segment Angle Vertex Plane
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POINT
QUIZ
Point an exact location in space. It is ALWAYS
named with a capital letter.
Example Point P .P
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LINE
QUIZ
Line a straight path of point that continues
infinitely in two directions. A line is named by
any two points on it.
Example Line AB or AB A
B
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LINE SEGMENT
QUIZ
Line segment- a part of a line that begins at one
point and ends at another point.
Example Line Segment EF, or EF E F
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RAY
QUIZ
Ray - this has one endpoint and continues
infinitely in one direction.
Example  Ray CD, or CD   C
D
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ANGLE
QUIZ
Angle a figure formed by two rays that have the
same end point.
X
Angle Y, angle XYZ, angle ZYX Y XYZ
ZYX
NAMES OF THE ANGLE
Y
Z
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VERTEX
QUIZ
Vertex An angle is named by its vertex or by
three points with its vertex in the middle.
Example Z (Vertex ) Y
X
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PLANE
QUIZ
Plane a flat surface. It continues in all
directions. It is usually named with a small
letter. Example
m
Plane m
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ANGLES
QUIZ
Straight Angle - this measures 180 Right Angles
this measures 90 Obtuse Angle - measures
more than 90 but less than 180 Acute Angle -
measures less than 90
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LINES
QUIZ
Intersecting Lines Lines that meet
Perpendicular Lines Lines that intersect and
form right angles.
 Parallel Lines Lines in a plane that never
intersect.
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TRIANGLES
QUIZ
SIDE CLASSIFICATION
Equilateral Isosceles Scalene - all three
sides - two sides - none of the sides are
equal. are equal are equal
ANGLE CLASSIFICATION

Acute Right Obtuse - all
angles - one angle - one angle measure
less than is 90 degrees measures 90
degrees
more than 90 degrees
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POLYGONS
QUIZ
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CONGRUENT SIMILAR FIGURES
QUIZ
Congruent Figures are EXACTLY the same size AND
shape. Example Rectangle A is
Rectangle B

Reminder means congruent means similar to

A
B
Similar Figures are the shape, but different
sizes. Example Square C Square D
C
D
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SYMMETRY
QUIZ
A shape has symmetry when you can fold one half
over the other half perfectly. Examples
These figures do not have any lines of symmetry
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CIRCLES
QUIZ
T
U
R
S
V
W
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TRANSLATION ROTATION REFLECTION
QUIZ
Translation - when you slide the figure along a
straight line.
Reflection when you flip the figure along a
line of symmetry. The new figure is called a
reflection.
Rotation you turn the figure on a curved path
around a point.
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ANGLE PAIRS
Congruent Angles Same measure Vertical
Angles A pair of angles formed by intersecting
lines. (Hint Think of the angle on the opposite
side.)
30 º
30 º
MORE
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ANGLE PAIRS cont...
Adjacent Angles A pair of angles with a common
vertex and a common side. (hint theyre next
to each other) Complimentary Angles Angles
that add up to 90º. Supplementary Angles
Angles that add up to 180 º.
60º
30º
80º
100º
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Quiz

• What do you call a six sided polygon?
• Heptagon b. Hexagon c. Decagon d.
  quadrilateral
• What do you call a triangle with no equal sides?
• Scalene b. Obtuse c. Isosceles d. Equilateral
• An angle that measures 91 degrees is an
  __________ angle.
• Right b. Obtuse c. Straight d. Acute
• A ten sided polygon is called
• Tenagon b. Nonagon c. Polygon d. Decagon
• Which letter is the vertex in this angle? Angle
  PHY
• a. P b. H c. Y d. there is no vertex

More Questions
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Quiz Page 2

• Two lines that will never meet are called
• Parallel lines b. Perpendicular lines c.
  Intersecting lines
• Two lines that form right angles when they meet
  are called
• a. Parallel lines b. Perpendicular lines c.
  Intersecting lines
• Two lines that cross but do not necessarily form
  right angles are called
• a. Parallel lines b. Perpendicular lines c.
  Intersecting lines
• What kind of a triangle has one obtuse angle and
  two acute angles?
• a. Acute triangle b. Obtuse triangle c.
  Right triangle

More Questions
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Quiz Page 3

• What kind of triangle has three acute angles?
• Acute triangle b. Obtuse triangle c. Right
  triangle
• What kind of triangle has one right angle?
• Acute triangle b. Obtuse triangle c. Right
  triangle
• When a figure can be folded in half perfectly
  this is called
• Congruent b. Similar c. Symmetry d. Chord
• Two figures that are exactly the same shape and
  size are called
• Congruent b. Similar c. Symmetry d. Chord
• Two figures that are the same shape but different
  sizes are called
• Congruent b. Similar c. Symmetry d. Chord

More Questions
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Quiz Page 4

• A triangle has one angle that measures 45
  degrees, another that measures 30, what is the
  third angle?
• 95 b. 5 c. 105 d. 75
• In a circle the line that starts at the center
  and then stops at any point on the circle is
  called the
• Radius b. Diameter c. Chord d. Center
• In a circle the line that starts at one point on
  the circle, travels through the center and then
  to another point on a circle is called
• Radius b. Diameter c. Chord d. Center
• 18. In a circle the line that starts at one point
  on the circle and travels to another point on a
  circle is called
• a. Radius b. Diameter c. Chord d. Center

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Quiz Page 5

• A figure that starts at one point and stops at
  another is called a
• Line segment b. Line c. ray d. Point
• A figure that starts at one point and then
  travels on forever in another direction is
  called
• Line segment b. Line c. ray d. Point
• A figure that goes on forever in both directions
  is called a
• Line segment b. Line c. ray d. Point
• An exact location is called
• Line segment b. Line c. ray d. Point

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