Angles, Triangles and Quadrangles

Vocabulary - please add these to your journals.

anglevertexright anglequadranglequadrilateralparallelogrampolygon

67

47

1,416

5,890

14,002

10,234

903 3,128 346,041

Mental Math - Place Value

What is the value of the digit in red?

Please take 4 straws of each size.Make a design or geometric shape. To fit one straw inside the other, slightly fold the end in half.

1) Please make a square.2) Join your square with the three people who are closest to you to form a cube.

Constructing Angles

Please take 2 straws and fit them into each other to form one long straw.

They meet at a point called a VERTEX.

The two straws form an ANGLE.

Right Angles

Right Angles are square corners.Use your straw to show me a right angle.Show me an angle smaller than a right angle.Show me an angle larger than a right angle.

We have a special symbol to put inside a right angle. It makes the

center of the angle look like a cube or a box.

What do the lines of an angle look like?

How about 2 __ays? Put them together to form an angle.The two endpoints form the vertex.

Look at the angle below. Please label the vertex BPlease put a point A on one of the rays.Please put a point C on the other ray.

One name for this angle is angle ABC (written ABC)The middle letter in the name of the angle always names the vertex. (Just like your middle initial names your middle name.)

Tell me another name for angle ABC?

No, because the nameof the vertex must be

in the middle.

Can I call this angle BAC? Why or why not?

B

A

C

Let's make some fun geometric shapes using bendable straws.

Click on the straw to go!

RSA

Exit Slip - Please choosetwo of the quadrangles you

made during the lesson, and explain how they are

alike and how they aredifferent.