Come and meet the Angle family...

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The Angles Come and meet the Angle family.... “Hi! We’re the Angles, we’re one family, but all very different, so let us tell you a bit about ourselves!”

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Presentation transcript:

Come and meet the Angle family... The Angles Come and meet the Angle family...

What is an angle? Two rays that share the same endpoint form an angle. The point where the rays intersect is called the vertex of the angle. The two rays are called the sides of the angle.

Here are some examples of angles.

We can identify an angle by using a point on each ray and the vertex We can identify an angle by using a point on each ray and the vertex. The angle below may be identified as angle ABC or as angle CBA; you may also see this written as ABC or as CBA. The vertex point is always in the middle.

Angle Measurements We measure the size of an angle using protractor in degrees. Here are some examples of angles and their degree measurements.

Protractor

“Hi! We’re the Angles, we’re one family, but all very different, so let us tell you a bit about ourselves!”

Mr. Obtuse Angle This is Obtuse. He’s the husband of the family. He’s bigger than Right and Acute . He’s always inside, and he always measures between 90° and 180° (depending on how much dinner he’s eaten!)

Mrs. Right Angle This is me. I’m Mrs. Right Angle. I always measure 90°, my favourite shape is a square, and whatsmore, no matter what my husband tells you, I’m always right!

Baby Acute Angle This is baby Acute angle. Isn’t he cute?! He loves a hug, and always has his arms out for cuddles! He’s the smallest of the family, measuring less than 90°.

Miss Straight Line Angle This is sister straight line angle. She loves to walk on the ropes and walls in the Circus. So her arms are always straight to move easily. She always measures 180°.

Reflex Angle This is our pet dog, Reflex. He’s always outside. He’s only a pup at the moment so he measures 180°, but he can grow up to 360 °! So he’s definitely the biggest angle. You’ll never see him without that ball in his mouth either, horrid thing!

So, now you’ve met us, let’s see how well you know us... Who am I? I always measure less than 90° I’m the smallest angle I’m very cute!

I’m....

I can measure between 180° and 360° Who am I? I’m always outside I’m the biggest angle I can measure between 180° and 360°

I’m... Reflex Angle

Who am I? I always measure between 90° and 180 ° I’m always inside I’m bigger than Right and Acute

I’m...

I’m equal to two right angles Who am I? I always measure 180 ° I’m always straight I’m equal to two right angles

Miss straight line angle I'm…… Miss straight line angle

Who’s left?