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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