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**Measuring, calculating and drawing angles...**

Our learning objectives today To use a protractor to: measure acute and obtuse angles to the nearest degree. draw acute and obtuse angles to the nearest degree. To calculate angles on a straight line.

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**Here is a standard protractor like you**

What do we use to help us? A protractor Here is a standard protractor like you use in the classroom.

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**When we use a protractor, we need to line it up correctly.**

You need to make sure the protractor is lined up correctly. Is this ready to measure the angle?

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**Were you right......................it wasn’t**

Look for the upside down ‘T’ in the middle of the straight line on your protractor. This needs to be exactly on the vertex of your angle.

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**We need to remember..... It doesn’t matter which way round the**

angle is, you ALWAYS need to line the upside down ‘T’ to the vertex of the angle.

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Now you are ready. Read from the 0°, and follow the inner set of numbers.

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**Once you reach 30° you need to be careful!!!**

You then need to look at the 1° markings on the outer set of numbers.

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What does it measure? This angle measures 35°.

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**Measuring, calculating and drawing angles...**

Remember our learning objectives today are To use a protractor to: measure acute and obtuse angles to the nearest degree. draw acute and obtuse angles to the nearest degree. To calculate angles on a straight line.

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