# Fun with Angles and Polygons

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```					Fun with Angles and Polygons

A unit for learning

Ms. Collette Robitaille
Introduction to Geometry
•   Unit 1: Angles (2 days)
•   Unit 2: Triangles (2 days)
•   Unit 3: Quadrilaterals (2 days)
•   Geometry Webquest (5 days)
•   Review Activities (3 days)
•   Test (1 day)
*This is a 3 week unit of instruction.
Unit One: Exploring Angles
Can you name the following angles?

obtuse                            acute

right                           straight

Click on the angle to reveal its name.
Angle Information

• Acute Angles – measure less than 90º

• Right Angles – measure exactly 90º

• Obtuse Angles – measure more than 90º
but less than 180º

• Straight Angles – measure exactly 180º
• Can you think of a way to
remember the names for each
angle?
Activity

•   For this activity, you will be paired up with a partner to visit
the following website.

•   After clicking below, skip the intro and click on the Make
the Angle Game.

•   You and your partner must make 10 angles and record
them on a sheet of paper.

•   Once you have recorded 10 angles, tell what type of angle
it is.

http://www.amblesideprimary.com/ambleweb/mentalmaths/protractor.html
Unit One: Angles Quick Check

Question #1
An acute angle is greater than 90º.

A. True
B. False
Unit One: Angles

OOPS!!!!!
Remember an acute angle is a cute
little angle.

Try Again
Unit One: Angles
Congratulations!!!!!

An acute angle is less than 90º.
Unit One: Angles Quick Check
Question #2
An obtuse angle is greater than
90º but less than 180º.

A. True
B. False
Unit One: Angles Quick Check
OOPS!!!!!

Better check again. Obtuse
angles are almost right and not
quite straight.

Try Again
Unit One: Angles Quick Check
Congratulations!!!!

An obtuse angle is between
90ºand 180º.
Unit One: Angles Quick Check
Question # 3
A straight angle measures 180º.

A. True
B. False
Unit One: Angles Quick Check
OOPS!!!!!

Remember. A straight angle looks
like a straight line.

Try Again
Unit One: Angles Quick Check
Congratulations!!!!

A straight angle measures 180º
and looks like a straight line.
Unit One: Angles Quick Check
Question #4
A right angle does not measure
90º.

A. True
B. False
Unit One: Angles Quick Check
OOPS!!!!!

A right angle looks like the corner of a
piece of paper.

Try Again
Unit One: Angles Quick Check
Congratulations!!!!

A right angle does measure
exactly 90º.
Unit Two : Triangles
Can you identify theses triangles by their
angles?

Right                 acute                 obtuse

Unit Two: Triangles
• Right Triangles - have exactly one right
angle.

• Acute Triangles – all angles are less than
90º.

• Obtuse Triangles - have exactly one angle
greater than 90º.
Unit Two: Triangles
Can you identify these triangles by their
sides?

isosceles          scalene               equilateral

Unit Two: Triangles
• Isosceles Triangles - two sides are of
equal length

• Scalene Triangles - no sides are equal in
length

• Equilateral Triangles - all sides are of equal
length
complete the activity on the webpage listed
below. Review the triangles and then click
sheet of paper.

Triangles Review
Can you identify the following quadrilaterals?

parallelogram                             rectangle

square

rhombus                                   trapezoid

• Parallelograms - 4-sided figure, opposite
sides are parallel and congruent
• Rectangle – 4 sided figure with 4 right
angles and opposite side congruent
• Square – 4 sided figure with 4 right angles
and 4 congruent sides
• Rhombus – 4 sided figure, all sides are
congruent
• Trapezoid – 4 sided figure with one pair of
parallel lines
visit the following website.
• Using the virtual geoboard you and your
partner will need to construct each of the
• To complete the assignment, on a sheet of
paper, tell how many geobands were
http://matti.usu.edu/nlvm/nav/frames_asid_129_g_3_t_3.html
Check
Question #1
A rectangle is a four sided figure with 4
congruent sides.

A.   True
B.   False
OOPS!!!!!!!!

Think about it. A rectangle looks
like a long box.

Try Again
Great!!!!!!!!!

You remembered that a rectangle
has 2 parallel sides, 4 right
angles, and opposite sides are
congruent.
Check
Question #2
A rhombus has four congruent sides.

A.   True
B.   False
OOPS!!!!!!!!

Remember that a rhombus looks
like a kite or a diamond.

Try Again
HOORAY!!!!!!

You remembered that a rhombus
looks like an italic square and all 4
sides are congruent.
Check
Question #3
A square is a quadrilateral with only two right
angles.

A.   True
B.   False
OOPS!!!!!!!!!

A square has all sides congruent
and all angles congruent.

Try Again
Nice Job!!!!!!!

You knew that a square has four
equal sides and four equal angles.
Check
Question #4
A trapezoid is a four sided figure with one set
of parallel sides.

A.   True
B.   False
OOPS!!!!!!

Think of the tables in a classroom.
It looks like a triangle without the
top.

Try Again
AWESOME!!!!!!!

A trapezoid has exactly one set of
parallel sides.
Check
Question #5
A parallelogram has two sides that are
parallel and opposite angles are congruent.

A.   True
B.   False
OOPS!!!!!!

Remember that a parallelogram
looks like an italic rectangle.

Try Again
Nice Work!!!!!

A parallelogram is a 4 sided figure
with opposite sides parallel and
opposite angles congruent.
Unit Four: Geometry Web Quest
Unit Four: Geometry Web Quest
• For this part of the unit I would like for you
and your partner to explore geometry using
the internet.
• There are two web quests listed below.
• Follow the directions for each and turn in

Web Quest #1
Web Quest #2
Unit Review
• Go back through the slide show to
complete the review sheet given to
you.
• Remember to look at the quizzes for