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## PowerPoint Slideshow about ' Numeracy' - ernie

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### Numeracy

### Types of Angle

### Angles in a triangle

### What’s my angle?

### What’s my angle?

L.O. I can calculate the angles in a triangle.

More than 90°

Right angle

90°

Acute angle

Less than 90°

Straight angle

180°

Reflex angle

More than 180°

The angles in EVERY triangle add up to 180°

What’s this angle?

80º

130º

?

50º

180° - 130° = 50°

50° + 80° = 130°

180° - 130° = 50°

80º

115º

65º

?

50° + 80° = 130°

180° - 130° = 50°

180° - 115° = 65°

- Orange Group:
- Mrs Broughton will be working with you.
- Working in pairs, draw triangles for each other. For each triangle:
- a) Estimate the sizes of all three angles.
- b) Measure two angles and check them together.
- c) Calculate the third angle in the triangle using the 180° rule.
- Yellow/Green Group:
- Mrs Lowe will be working with you.
- Complete page 54 of the Abacus book.
- When you have finished, work in pairs to create your own triangle problems for each other and solve them.
- Red/Blue Group:
- Miss Rostron will be working with you.
- Complete page 55 of the Abacus book.
- When you have finished, work in pairs to create your own triangle problems for each other and solve them.

L.O. I can calculate the angles in a triangle.

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