Sunday, March 1, 2015

Angles

We have begun our geometry unit and the kiddos are loving it! We have learned all about angles so far.

An  angle  is the intersection of two rays with a common endpoint.


There are four types of angles that we have learned about.

An acute angle is an angle whose measure is less than 90°.

A right angle is an angle whose measure is 90°.

An obtuse angle is an angle whose measure is more than 90°,
                            but less than 180°.

A straight angle is an angle whose measure is 180°.


Remember that an angle is named using three letters, where the middle letter corresponds to the vertex of the angle.  The angle below is <ABC or <CBA.   If it is perfectly clear which angle is being named, an angle may be referred to by its vertex letter alone, such as <B.


Here is a fun website that allows you to play around with angles:
Angles

Homework this week will have kiddos identifying types of angles. Please let me know if you have any questions. Have a great week!

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