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Unit 3 Study Guide
Measure the first three angles with a protractor.
89°
85°
100
°
Choose a word from the box to describe these angle types.
Acute
Obtuse
Obtuse
Acute
Right
Right
Reflex
Reflex
Draw a 35° angle.
Label it <BAT
B
Draw a 142° angle.
Label it <PIG
Draw a reflex angle.
Label it <HEN
P
E
T
A
I
H
G
N
Use your geometry template to draw the following triangles.
Then write the characteristics of each triangle.
Equilateral triangle
- 3 congruent sides
-
Isosceles triangle that is not equilateral
- at least 2 congruent sides
3 congruent angles
Right triangle
- 1 right angle
Scalene triangle
- all 3 sides different lengths
Fill in the T Chart to compare and contrast:
(Same)
(different)
Equilateral Triangle
Scalene Triangle________
-
3 sided polygon
- 3 sided polygon
-
3 congruent sides
- 3 sides different lengths
-
3 congruent angles
- 3 angles with different measures
How many degrees does a straight angle have?
How many degrees are inside a triangle?
__
____180°________
______180°__________
60+51=111
75+53=128
180-111=69
180-128=52
69°
52°
30+82=112
36+91=127
53°
Define a Tessellation:
-
repeated pattern
-
no gaps
-
no overlaps
180-127=53
68°
180-112=68
Review:
Use a straight edge to draw a pair of adjacent angles. Make one of the angles acute. Use the
letters AROD VIKE to label the angles. (GO YANKEES!) (GO VIKINGS!)
K
V
E
I
For each polygon, fill in the circle next
to all true statements.
o
o
o
This polygon is a quadrangle
At least two sides are parallel
At least two angles are congruent
o
o
o
o
this polygon is a quadrangle
at least one angle is acute
at least one angle is obtuse
this is a regular polygon
o
o
o
this is a regular polygon
At least two sides are parallel
At least one angle is acute
o
o
o
At least two sides are parallel
At least one angle is obtuse
At least two angles are
congruent