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Math is one of my FAVORITE subjects!
It is my goal to make math fun!
*at the bottom of this page are links to practice pages!


HOMEWORK: rotate and slide your name!

Chapter 10

The Degree Symbol: °

We use a little circle ° following the number to mean degrees.

For example 90° means 90 degrees

Measuring Degrees

We often measure degrees using a protractor:

The normal protractor measures 0° to 180°


Protractors usually have two sets of numbers going
in opposite directions.

Be careful which one you use!

When in doubt think "should this angle be bigger or
smaller than 90° ?"

Type of AngleDescription
Acute Anglean angle that is less than 90°
Right Anglean angle that is 90° exactly
Obtuse Anglean angle that is greater than 90° but less than 180°
Straight Anglean angle that is 180° exactly

Parts of an Angle

The corner point of an angle is called the vertex

And the two straight sides are called arms

The angle is the amount of turn between each arm.

You can be a "pro" at using a protractor!

LEARN THE LINGO!!  Addition6 + 3
6 plus 3
Add 6 and 3
The sum of 6 and 3
6 more than 3
6 greater than 3
Subtraction6 – 36 minus 3
6 take away 3
Subtract 6 and 3
3 less than 6
The difference of 6 and 3
6 x 3
Multiply 6 and 3
The product of 6 and 3
6 times 3

6 divided by 3The quotient of 6 and 3

Subpages (1): Math Minutes