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**Angles 1 – What is an angle?**

Tandi Clausen-May Teaching Maths to Pupils with Different Learning Styles London: Paul Chapman, 2005 Click the mouse only when you see ‘Click the mouse’ . Otherwise you will miss some of the dynamic bits. Click the mouse.

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An angle is a measure of a n g l e turn. Click the mouse.

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A whole turn. Click the mouse to see a whole turn. Click the mouse.

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A half turn. Click the mouse to see a half turn. Click the mouse.

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A quarter turn. Click the mouse to see a quarter turn. Click the mouse.

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**A quarter turn is a right angle.**

Click the mouse to see a quarter turn right angle. Click the mouse.

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**A half turn is a straight angle.**

Click the mouse to see a half turn straight angle. Click the mouse.

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**A three quarter turn is one size of reflex angle.**

Click the mouse to see a three quarter turn reflex angle. Click the mouse.

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**An acute angle is less than a quarter turn.**

For example, a one sixth turn is an acute angle. Click the mouse to see a one sixth turn acute angle. Click the mouse.

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**An obtuse angle is more than a quarter turn, but less than a half turn.**

For example, a one third turn is an obtuse angle. Click the mouse to see a one third turn obtuse angle. Click the mouse.

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**A reflex angle is more than a half turn.**

For example, a two thirds turn is a reflex angle. Click the mouse to see a two thirds turn reflex angle. Click the mouse.

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**Angles 2 – Measuring angles**

Now watch Angles 2 – Measuring angles

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Warm Up Solve each equation. 1. 62 + x + 37 = 180 2. x + 90 + 11 = 180 3. 2x + 18 = 180 4. 180 = 2x + 72 + x Course 3 7-3 Angles in Triangles x = 81 x.

Warm Up Solve each equation. 1. 62 + x + 37 = 180 2. x + 90 + 11 = 180 3. 2x + 18 = 180 4. 180 = 2x + 72 + x Course 3 7-3 Angles in Triangles x = 81 x.

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