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Chapter 1
Polygons
Bell Work
What is a polygon?
 Give some examples.

Polygons

What is a closed figure in a plane, formed by
connecting line segments endpoint to endpoint
with each segment intersecting exactly two
others?
Polygons
Not Polygons
Polygons
What do you call each line segment?
 What do you call where the sides meet?

side
Vertex
Polygons

How do you classify a polygon?
Sides
Familiar
polygons
have
specific
names
Name
3
4
5
6
n
See complete chart on page 54
The ones
without
specific
names are
called?
Polygons
What does consecutive mean?
 Find the consecutive angles, vertices and
sides of the polygon below:

Polygons

How do we name a polygon?
List the vertices in consecutive order
Polygons

What line segment connects two
nonconsecutive vertices?
A diagonal
Polygons


Concave polygons

Congruent polygons

Convex polygons

If and only if they have
the same measures.
If no diagonal is outside
the polygon



If at least one diagonal is
outside the polygon
Polygons

Fill in the blank
CAMP ___ _____
Polygons
What do you call a polygon which all the
sides have equal length?
Equilateral polygon
 What about when all the angles have
equal measure?
Equiangular polygon
 What if it’s both?
Regular polygon

Polygons
HLA:
page 56 (4-7,12-14,16)
Page 62 (1-4) , page 63 (17-21)

Checking for Understanding
What is a polygon?
 What are consecutive sides?
 What are consecutive angles?
 What is a diagonal?
 What is a regular polygon?
 What are corresponding parts of
polygons?

Triangles and Special Quadrilateral

Right Triangle

Acute Triangle

Obtuse Triangle



Scalene Triangle
Equilateral Triangle
Isosceles Triangle






Has three congruent
sides
Has at least two
congruent sides
Has one right angle
Has one Obtuse
Angle
Has three acute
angles
No congruent sides
Chapter 1
Triangles and Special
Quadrilateral
Triangles and Special Quadrilateral






Trapezoid
Kite
Parallelogram
Rhombus
Rectangle
Square
1.
2.
3.
4.
5.
6.
7.
8.
quadrilateral
1 pair of parallel sides
equilateral
2 pairs of congruent
angles
2 pairs of congruent
sides
equiangular
regular
2 parallel sides
Triangles and Special Quadrilateral






Trapezoid: a quadrilateral with exactly one pair of
parallel sides.
Kite: a quadrilateral with two distinct pairs of consecutive
congruent sides.
Parallelogram: a quadrilateral with two pairs of parallel
sides.
Rhombus: an equilateral parallelogram.
Rectangle: a parallelogram with four congruent angles
Square: an equilateral rectangle, an equiangular
rhombus and a regular quadrilateral.
Triangles and Special Quadrilateral

HLA:
pp. 62 (1-4), 66(1-6) 72 (2-9)
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