Direction and Angle

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# direction and angle - PowerPoint PPT Presentation

Direction and Angle. Positions and directions. Objectives. Add and subtract a pair of two-digit numbers Recognise positions and directions Use the eight compass directions N, S, E, W, NE, NW, SE,SW. Make and measure clockwise and anticlockwise turns.

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### Direction and Angle

Positions and directions

Objectives
• Add and subtract a pair of two-digit numbers
• Recognise positions and directions
• Use the eight compass directions N, S, E, W, NE, NW, SE,SW.
• Make and measure clockwise and anticlockwise turns.
• What is:

48 + 26 ?

How did you work this one out?

Lets look at some different strategies that you used.

Now try these on your whiteboards, you have 2 minutes to work them out.

23 + 45 = 45 – 26 =

56 + 32 = 87 – 63 =

69 + 28 = 58 – 39 =

71 + 26 = 66 – 52 =

Did any of these cause difficulty?

Lets label the walls of the class N, S, E and W.
• Stand facing north
• Turn to face east, south and then west.
• Did you turn clockwise or anticlockwise?

Remember that a clockwise turn is to the right like the hands of a clock.

Stand facing north again.
• Make a quarter turn to face south.
• Did you turn clockwise or anticlockwise?

Remember that a quarter turn is a right-angled turn.

Stand facing north again.

Make a half turn clockwise.

Which direction are you facing?

Turn to face west. What sort of turn did you make?

Face north and turn clockwise through half a right angle.

Does anyone know which direction you are facing now?

Halfway between north and east is called north-east.
• What is half-way between north and west?
• North-west
• What is halfway between east and south?
• South-east
• What is halfway between south and west?
• South-west
Turn two anti-clockwise through two-right angles.
• In which direction are you facing now?

Who thinks that they could label this compass?

Copy and complete the compass in your books.

N

NE

NW

W

E

SW

SE

S