Today we investigated angles. We determined and learned that a RIGHT angle is exactly 90o. One student asked, "What is an angle that is more than 90o called?" Obtuse. "And what if it is less than 90o?" Acute - I remember that it is acute because it is a cute little angle, it's small.
Our MINDS ON! activity was sorting a variety of angles. Here are two different group solutions:
We had one group on the SmartBoard and three other groups on the iPads using the Smart Notebook App, and the remaining groups using laptops.
The Notebook app is $6.99; here is what we liked about the app:
- It is better than having to sit and wait your turn
- It is way better than cutting and pasting things on to a paper because then if we glue something where it isn't supposed to go, we can move it without a big mess, or having to start over.
As a class we looked at the response on the left - we talked about how all the angles are CLOSE to 90o but a couple students didn't think they were all right angles.
We talked about somethings around the room that looks like a right angle. We determined that it looks like the letter "L" and we can see it in squares, on the corner of our Smart Board and even the corner of the table in the room.
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