
Review
Yes, it is a polygon
No, it has a curved side
Yes, it is a polygon
Hexagon, Convex
Dodecagon, Concave
Heptagon, Concave
Equilateral
None of These
Regular
2
Vertical Pair
1
160°
20°
Supplementary Angles
2
1
Linear Pair
35°
55°
Complementary Angles
2
1
Vertical Pair
60°
30°
Complementary Angles
1
2
Linear Pair
90°
90°
Supplementary Angles
 Parallel Lines
 Perpendicular Lines
New Material
 Complete the Triangle
definition investigation on
page 60 & 61.
A right triangle is a
triangle that has one
right angle
An acute triangle is a
triangle that has three
acute angles
An obtuse triangle is a
triangle that has one
obtuse angle
A scalene triangle is a
triangle with no
congruent sides
An equilateral triangle
is a triangle that has
three congruent sides
An isosceles triangle is
a triangle that has at
least two congruent
sides
Isosceles Triangle
Base
Base Angles
Vertex
angle
Homework
Page 62 #1-7, 17-21

Turn to page 64. We will work through
each definition as a class.
A trapezoid is a
quadrilateral with
exactly one pair of
parallel sides
A kite is a quadrilateral
with two distinct pairs
of consecutive
congruent sides
A parallelogram is a
quadrilateral with two
pairs of parallel sides
A rhombus is an
equilateral
parallelogram
A rectangle is a
parallelogram with
four congruent angles
A square is an equilateral
rectangle.
A square is an
equiangular rhombus.
A square is a regular
quadrilateral.

Homework:
 Page 62 #1-7, 17-21
 Page 66 #1-12