Friday, February 14, 2014

Quiz: Angle Review

In geometry, we are learning about angles!

An angle is a  figure formed when two rays share the same endpoint.

Below is a special angle called a right angle
It is also called a 90˚ angle.

Any angle less than a right is called an acute angle.

Any angle greater than a right is called an obtuse angle.

Below is a quiz. Can you guess the angle?

Name That Angle! on PhotoPeach
Do you see any acute, right, or obtuse angles in your house?

1. Dear Mrs. Yollis and class,

I think obtuse and acute are much better vocabulary than greater than a right angle and less than a right angle. Another name for a right angle is a 90 degree angle. In class, I like the way we are using the lofty vocabulary words obtuse, acute, right angle, or 90 degree to enhance our vocabulary skills.

I see a 90 degree angle on the American flag, a piece of paper, on a face of a microwave, the publish and preview buttons on your blog and some other blogs, the screen of my TV, and a capital L.

I would see an acute angle on a slice of cheese pizza and any kind of V. I find obtuse angles on a analog clock when it strikes 6:00, an open book's edges, and a reclined driver's seat.

What other letters have a right angle (90 degree), obtuse angle, or an acute angle?

Sincerely,
Aashi

2. Dear Mrs. Yollis,

I concur with Aashi that obtuse and acute are better vocabulary than greater than and less than a right when describing angles. I see a lot of acute and obtuse angles just looking at the screen. I see a Google Chrome tab bar that on the side looks like an obtuse angle. I see another obtuse angle in the tweet screen. The second tweet in the middle has an obtuse angle. I also concur with Aashi that 90o is a better word than right angle. Looking at the computer itself I see four right angles, making it a rectangle, parallelogram and a quadrilateral. The best name is a rectangle because it is more specific that the other names that fit the category.

To answer Aashi’s question, a capital T has two right angles. A lower case t has four. A and V both have acute angles. A K has acute and obtuse angles. What letters have no angles?

Sincerely,

Bryce

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