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Fun with Angles and PolygonsPowerPoint Presentation

Fun with Angles and Polygons

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Presentation Transcript

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

Angles Task

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 #2

An obtuse angle is greater than

90º but less than 180º.

- True
- 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

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

OOPS!!!!!

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

Try Again

Unit Two : Triangles

Can you identify theses triangles by their angles?

Right

acute

obtuse

Click on the angle to check your answer.

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

Click on the triangle to check your answer.

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

Triangles Task

- 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

Unit Three: Quadrilaterals

Can you identify the following quadrilaterals?

parallelogram

rectangle

square

trapezoid

rhombus

Click on the quadrilateral to check your answer.

Unit Three: Quadrilaterals

- 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

Quadrilaterals Task

- 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

Unit Three: Quadrilaterals Quick Check

Question #1

A rectangle is a four sided figure with 4

congruent sides.

- True
- False

Unit Three: Quadrilaterals

OOPS!!!!!!!!

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

Try Again

Unit Three: Quadrilaterals

Great!!!!!!!!!

You remembered that a rectangle

has 2 parallel sides, 4 right

angles, and opposite sides are

congruent.

Unit Three: Quadrilaterals

OOPS!!!!!!!!

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

Try Again

Unit Three: Quadrilaterals

HOORAY!!!!!!

You remembered that a rhombus

looks like an italic square and all 4

sides are congruent.

Unit Three: Quadrilaterals Quick Check

Question #3

A square is a quadrilateral with only two right

angles.

- True
- False

Unit Three: Quadrilaterals

OOPS!!!!!!!!!

A square has all sides congruent and all angles congruent.

Try Again

Unit Three: Quadrilaterals

Nice Job!!!!!!!

You knew that a square has four

equal sides and four equal angles.

Unit Three: Quadrilaterals Quick Check

Question #4

A trapezoid is a four sided figure with one set

of parallel sides.

- True
- False

Unit Three: Quadrilaterals

OOPS!!!!!!

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

Try Again

Unit Three: Quadrilaterals Quick Check

Question #5

A parallelogram has two sides that are

parallel and opposite angles are congruent.

- True
- False

Unit Three: Quadrilaterals

OOPS!!!!!!

Remember that a parallelogram looks like an italic rectangle.

Try Again

Unit Three: Quadrilaterals

Nice Work!!!!!

A parallelogram is a 4 sided figure

with opposite sides parallel and

opposite angles congruent.

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 your completed project. Have fun!!!
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 possible answers.
- Enjoy your time using the interactive unit
- Test tomorrow on our Introduction to Geometry.

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