Geometry is shapes. I learned about this in second grade.
Today, we are going to work a few geometry problems. Do y'all know what geometry is?
Yeah, me too.
What's a right angle? I'll just skip that part.
That's right! I've given each of you a worksheet with two problems on it. I want you to work it out on your own and then we can talk about it.
That's what I did, too!
Okay. I did not show my work because I did not know what to write. I read each clue and then marked out the shapes that did not fit.
Awesome job working out the problems and taking your time! Now I am going to ask a few questions. Andrew, will you tell me how you solved the problems.
I didn't know what a right angle was, so I just skipped that part.
So you both used "process of elimination." That is a great strategy to use. When we are working out tricky problems, we can always start by eliminating answers that are silly or don't make sense.
A right angle is 90 degrees.
That's right. A right angle makes a 90 degree angle. Think of it like a corner of a square. Squares always have four right angles, just like a rectangle. If you are not sure, you can always use the corner of your paper to check to see if it is a right angle. You can use an index card to check.
I want to try!
Let's do it! You take any corner of the index card and line it up with angle of the shape. If it fits perfectly, it is a right angle. If the shape's anlge is bigger than the index card, it is an obtuse angle. If the shape's angle is smaller than the index card, what is it called? That's right! Awesome job today guys. We will learn more about shapes and angles next week!