Click here to see more videos: https://alugha.com/FuseSchool Parallel lines are always the same distance apart and never meet. We use arrowheads are used to show that lines are parallel. See how these lines have one arrow. Then, because these ones are also parallel, but not parallel to the ones before, they have two arrows. Parallel lines create lots of angles that are either the same or correspond to one another. In this video we are going to discover what these keywords mean and we're going to use them to find missing angles. Before we start, you should already know that there are 180 degrees in a straight line. That's a key piece of knowledge that we use when solving parallel line angle questions. So what do you notice about alternate angles? Alternate angles are always the same. They make a Z shape. So, you can look out for Z’s but you do also need to remember the name: Alternate. These angles are called Corresponding Angles. What do you notice about them? Corresponding Angles are also the same but this time they look more like an F than a Z. These are called Interior Angles. What do you notice about them? Interior Angles always add up to 180 degrees. This is like a C rather than an F or a Z. And so, the final thing we need to add are: Vertically Opposite Angles. What do you notice? Opposite Angles on a point are always equal. Using these 4 angle facts that there are 180 degrees on a straight line, 360 degrees around a point and 180 degrees in a triangle, here are some questions today. Pause the video. Find the angles and click play when you're ready. Did you get the angles right? Your explanation may be different but just make sure you used the current terminology. Here are my reasons; as long as you use the current terminally then any current reason counts. Here's a final puzzle for you to do. With just these four angles, can you find all the other internal angles? Pause the video and then click play when you want the answers. If you liked the video give it a thumbs up and don't forget to subscribe. Comment below if you have any questions. Why not check up our FuseSchool app as well. Until next time! SUBSCRIBE to the FuseSchool channel for many more educational videos. Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT. VISIT us at www.fuseschool.org, where all of our videos are carefully organised into topics and specific orders, and to see what else we have on offer. Comment, like and share with other learners. You can both ask and answer questions, and teachers will get back to you. These videos can be used in a flipped classroom model or as a revision aid. Friend us: http://www.facebook.com/fuseschool This Open Educational Resource is free of charge, under a Creative Commons License: Attribution-NonCommercial CC BY-NC ( View License Deed: http://creativecommons.org/licenses/by-nc/4.0/ ). You are allowed to download the video for nonprofit, educational use. If you would like to modify the video, please contact us: info@fuseschool.org
Algebraic fractions are simply fractions with algebraic expressions either on the top, bottom or both. We treat them in the same way as we would numerical fractions. In this video we look at how to simplify algebraic fractions, and how to add and subtract them. VISIT us at www.fuseschool.org, wh
CREDITS Animation & Design: Peter van de Heuvel Narration: Lucy Billings Script: Lucy Billings The word polygon comes from Greek. Poly means “many” and Gon means “angles”. Polygon = many angles. Polygons are 2-dimensional shapes, that are made of straight lines, with all the sides joined up. VISIT
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