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WEEK # 1
Monday,
February 18,
2008
M6.C. 1.1.3 Identify and/or
determine the measure
of the diameter and
/or radius of a
circle (when one or
the other is given)
FOCUS:
GEOMETRY
Diameter – a line segment that has endpoints on a
circle and passes through the center of the circle; the
diameter is twice the radius
Radius – a line segment that has one endpoint on a
circle and the other endpoint at the center of the
circle; the radius is half of the diameter
Other definitions that may be useful:
Circumference – the distance around a circle
Chord – a line segment whose endpoints are on a circle
but does not pass through the center of the circle
PRACTICE QUESTION:
Find the diameter of the circle below.
Tuesday,
February 19,
2008
M6.C.1.1.2 – Identify
and/or describe
properties of all
types of triangles
Triangle – a 3 sided polygon
Scalene Triangle – a triangle with sides of differing
measures
Equilateral Triangle – a triangle with 3 sides of equal
measure
Isosceles Triangle – a triangle with 2 sides of equal
measure
Right Triangle – a triangle with one right (90
degrees) angle
Acute Triangle – a triangle with 3 acute angles (less
than 90
degrees)
Obtuse Triangle – a triangle with at least one obtuse
angle
(greater than 90 degrees)
Hypotenuse – the leg of a right triangle opposite the
right
angle
Leg (of a right triangle) – either of the two sides
that form
the right angle in a right triangle
PRACTICE QUESTION:
Classify the triangle by sides and angles.
Wednesday,
February 20,
2008
Polygon – a closed figure made up of 3 or more line
segment; none of the lines may be intersecting
Quadrilateral - a polygon with 4 sides
Pentagon- a polygon with 5 sides
Hexagon – a polygon with 6 sides
Heptagon – a polygon with 7 sides
Octagon – a polygon with 8 sides
Nonagon – a polygon with 9 sides
Decagon – a polygon with 10 sides
M6.C1.1.1 – Identify,
classify and/or
compare polygons (up
to ten sides.)
PRACTICE QUESTION:
What type of polygon is this?
180 degrees in a triangle
360 degrees in a quadrilateral
360 degrees in a circle
Thursday,
February 21,
2008
PRACTICE QUESTION:
Find the missing angle in the given polygon.
M6.C.1.1.4 – Identify
and/or use the total
number of degrees in
a triangle,
quadrilateral and/or
circle.
77o
100o
?
82o
Friday,
February 22,
2008
M6.C.1.2.1 –
Identify, describe
and/or label
parallel,
perpendicular or
intersecting lines
M6.C1.2.2 – Identify,
draw and/or label
points, planes,
lines, line segments,
rays, angles and
vertices.
Parallel lines – lines that never intersect
Perpendicular lines – lines that intersect at a 90
degree
angle
Intersecting lines – lines that cross each other
Ordered pairs (3,8) – the first number, the xcoordinate, indicates movement along the horizontal
axis; the second number, the y-coordinate indicates
movement along the vertical axis
Plane – a flat surface that extends forever in all
directions
Line – a straight path of points that extends forever
in two directions
Line segment – part of a line that has two endpoints
Ray – a part of a line with one endpoint that extends
forever in one direction
Angle – two rays with the same endpoint
Vertex – the common endpoint of two rays that form an
angle; the point of intersection of two sides of a
polygon
PRACTICE QUESTION:
Label the following points:
A (4, 3)
B (5, 1)
C (0, 3)
Connect the three points to make a triangle.
How many line segments are contained in the triangle?
How many vertex points do you see?