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fun with angles and polygons - PowerPoint PPT Presentation

Fun with Angles and Polygons. A unit for learning about geometry 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)

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Fun with Angles and Polygons

A unit for learning about geometry

Ms. Collette Robitaille

• 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.

Can you name the following angles?

obtuse

acute

right

straight

Click on the angle to reveal its name.

• 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

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

Question #1

An acute angle is greater than 90º.

• True

• False

OOPS!!!!!

Remember an acute angle is a cute little angle.

Try Again

Congratulations!!!!!

An acute angle is less than 90º.

Question #2

An obtuse angle is greater than

90º but less than 180º.

• True

• False

OOPS!!!!!

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

Try Again

Congratulations!!!!

An obtuse angle is between 90ºand 180º.

Question # 3

A straight angle measures 180º.

• True

• False

OOPS!!!!!

Remember. A straight angle looks like a straight line.

Try Again

Congratulations!!!!

A straight angle measures 180º and looks like a straight line.

Question #4

A right angle does not measure

90º.

• True

• False

OOPS!!!!!

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

Try Again

Congratulations!!!!

A right angle does measure exactly 90º.

Can you identify theses triangles by their angles?

Right

acute

obtuse

• Right Triangles - have exactly one right angle.

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

• Obtuse Triangles - have exactly one angle greater than 90º.

Can you identify these triangles by their sides?

isosceles

scalene

equilateral

• Isosceles Triangles - two sides are of equal length

• Scalene Triangles - no sides are equal in length

• Equilateral Triangles - all sides are of equal length

• For this task, you and your partner, must complete the activity on the webpage listed below. Review the triangles and then click Triangles Quiz. Write your answers on a sheet of paper.

Triangles Review

Can you identify the following quadrilaterals?

parallelogram

rectangle

square

trapezoid

rhombus

• 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

• For this task, you and your partner should visit the following website.

• Using the virtual geoboard you and your partner will need to construct each of the five quadrilaterals we have discussed.

• To complete the assignment, on a sheet of paper, tell how many geobands were needed to create each quadrilateral.

http://matti.usu.edu/nlvm/nav/frames_asid_129_g_3_t_3.html

Question #1

A rectangle is a four sided figure with 4

congruent sides.

• True

• 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.

Question #2

A rhombus has four congruent sides.

• True

• 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.

Question #3

A square is a quadrilateral with only two right

angles.

• True

• 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.

Question #4

A trapezoid is a four sided figure with one set

of parallel sides.

• True

• 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.

Question #5

A parallelogram has two sides that are

parallel and opposite angles are congruent.

• True

• 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.

• 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 your completed project. Have fun!!!

Web Quest #1

Web Quest #2

• Go back through the slide show to complete the review sheet given to you.

• Remember to look at the quizzes for possible answers.

• Enjoy your time using the interactive unit

• Test tomorrow on our Introduction to Geometry.