6SS1+Angles+review

Students should be able to:
 * Identify examples of angles in their environment (surroundings)
 * Classify (name) angles by their measure
 * acute, right, obtuse, straight, reflex
 * Estimate the measure of angles using 45, 90 and 180 as reference angles
 * Measure angles with a protractor
 * Draw and label an angle with a given measure

It is important to know that a full circle has 360 degrees in it. Because of this 1/4 of the circle is 90 degrees, 1/2 of the circle is 180 degrees, etc.

=__**Reference Angles:**__= The direction the angle opens does NOT make a difference to the measure or the name. These 3 angles relate to each other in that 2 45 degree angles make a 90. 4 45 degree angles make a 180. 2 90 degree angles make a 180.

=**__Classify (name) angles by their measure:__**=

Any angle less than 90 is called an **ACUTE ANGLE**. A 90 angle is called a **RIGHT ANGLE**. An angle bigger than 90 but smaller than 180 is called an **OBTUSE ANGLE**. A 180 angle is called a **STRAIGHT ANGLE**. An angle larger than 180 is called a **REFLEX ANGLE**.

=__**Measuring and Drawing Angles with a Protractor**__=

Listed below are some online guides to help with measuring and drawing angles with a protractor.

When you draw an angle make sure to use the knowledge you have from the angle names to check to see if your angle makes sense. Example: If you are drawing a 97 degree angle you know it is OBTUSE. If you draw an angle that is acute something is wrong.

=__Online Activities for Measuring Angles__=

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