© T Madas 180 10 20 170 0 160 30 150 40 140 50 130 60 120 70 110 80 100 90 180 170 160 140 150 130...

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© T Madas 180 10 20 170 0 160 30 150 40 140 50 130 60 120 7 0 11 0 8 0 1 00 90 180 170 160 140 150 130 120 1 10 1 0 0 8 0 7 0 60 50 40 30 20 10 0

Transcript of © T Madas 180 10 20 170 0 160 30 150 40 140 50 130 60 120 70 110 80 100 90 180 170 160 140 150 130...

Page 1: © T Madas 180 10 20 170 0 160 30 150 40 140 50 130 60 120 70 110 80 100 90 180 170 160 140 150 130 120 110 100 80 70 60 50 40 30 20 10 0.

© T Madas

180

10

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1700

160

30150

40140

50130

60120

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110

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100

90

180

170

160

140

150

13012

0110

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403020100

Page 2: © T Madas 180 10 20 170 0 160 30 150 40 140 50 130 60 120 70 110 80 100 90 180 170 160 140 150 130 120 110 100 80 70 60 50 40 30 20 10 0.

© T Madas

What is a right angle?

Quarter turn

Right angleHalf turn

Straight line

2 Rig

ht angle

s

Three quarter turn

Full turn

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© T Madas

T y p e s o f A n g l e s

Acute angle Right angle Obtuse angle

Straight angle Reflex angle

Page 4: © T Madas 180 10 20 170 0 160 30 150 40 140 50 130 60 120 70 110 80 100 90 180 170 160 140 150 130 120 110 100 80 70 60 50 40 30 20 10 0.

© T Madas

180

10

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1700

160

30150

40140

50130

60120

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90

180

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150

13012

0110

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60

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403020100

What do we use for measuring angles?

In what units does it measure angles?

Why does it have a double scale?

ProtractorDegrees, °

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© T Madas

180

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1700

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30150

40140

50130

60120

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180

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13012

0110

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403020100

What type of angle is it?

Acute angleLess than

90°

40°

Page 6: © T Madas 180 10 20 170 0 160 30 150 40 140 50 130 60 120 70 110 80 100 90 180 170 160 140 150 130 120 110 100 80 70 60 50 40 30 20 10 0.

© T Madas

What type of angle is it?

Obtuse anglegreater than

90°

120°

180

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1700

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30150

40140

50130

60120

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180

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13012

0110

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403020100

Page 7: © T Madas 180 10 20 170 0 160 30 150 40 140 50 130 60 120 70 110 80 100 90 180 170 160 140 150 130 120 110 100 80 70 60 50 40 30 20 10 0.

© T Madas

Page 8: © T Madas 180 10 20 170 0 160 30 150 40 140 50 130 60 120 70 110 80 100 90 180 170 160 140 150 130 120 110 100 80 70 60 50 40 30 20 10 0.

© T Madas

Estimate the following angles

36°95° 65°

25° 127° 46°

108°

167°

Page 9: © T Madas 180 10 20 170 0 160 30 150 40 140 50 130 60 120 70 110 80 100 90 180 170 160 140 150 130 120 110 100 80 70 60 50 40 30 20 10 0.

© T Madas

41° 85° 56°

16°136° 46°

96°

178°

Estimate the following angles

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© T Madas

319°275° 304°

344°

225°316°

265°185°

Estimate the following angles

Page 11: © T Madas 180 10 20 170 0 160 30 150 40 140 50 130 60 120 70 110 80 100 90 180 170 160 140 150 130 120 110 100 80 70 60 50 40 30 20 10 0.

© T Madas

Page 12: © T Madas 180 10 20 170 0 160 30 150 40 140 50 130 60 120 70 110 80 100 90 180 170 160 140 150 130 120 110 100 80 70 60 50 40 30 20 10 0.

© T Madas

Estimate the following angles

36°95° 65°

25° 127° 46°

108°

167°

Page 13: © T Madas 180 10 20 170 0 160 30 150 40 140 50 130 60 120 70 110 80 100 90 180 170 160 140 150 130 120 110 100 80 70 60 50 40 30 20 10 0.

© T Madas

41° 85° 56°

16°136° 46°

96°

178°

Estimate the following angles

Page 14: © T Madas 180 10 20 170 0 160 30 150 40 140 50 130 60 120 70 110 80 100 90 180 170 160 140 150 130 120 110 100 80 70 60 50 40 30 20 10 0.

© T Madas

319°275° 304°

344°

225°316°

265°185°

Estimate the following angles

Page 15: © T Madas 180 10 20 170 0 160 30 150 40 140 50 130 60 120 70 110 80 100 90 180 170 160 140 150 130 120 110 100 80 70 60 50 40 30 20 10 0.

© T Madas