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