Measure and classify each angle: Angle Measure Type ∠ A O B ∠ A O C ∠ B O C ∠ D O C ∠ D O A ∠ D O B

To measure the the given angles place the midpoint of the protractor on the vertex of the angle. Adjust the protractor so that one arm of the angle is along the straight edge of the protractor. Read the scale which has the 0 ° mark coinciding with the straight-edge. Example: Measuring ∠ B O C we get it is 90 ° . We know that, An angle whose measure is less than 90 ° and greater than 0 ° is known as acute angle. An angle whose measure is more than 90 ° and less than 180 ° is obtuse angle. An angle whose measure is 90 ° is right angle. An angle whose measure is 180 ° is straight angle. The completed table is as follows: Angle Measure Type ∠ A O B 40 ° acute ∠ A O C 130 ° obtuse ∠ B O C 90 ° right ∠ D O C 90 ° right ∠ D O A 140 ° obtuse ∠ D O B 180 ° straight

E M B I B E

MATHEMATICS TEXTBOOK FOR CLASS VI>Chapter 5 - Understanding Elementary Shapes>EXERCISE 5.4>Q 7

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6th CBSE

IMPORTANT

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An angle whose measure is less than that of a right angle is a/an angle.

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Important Questions on Understanding Elementary Shapes

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6th CBSE

IMPORTANT

MATHEMATICS TEXTBOOK FOR CLASS VI>Chapter 5 - Understanding Elementary Shapes>EXERCISE 5.4>Q 7

An angle whose measure is greater than that of a right angle is a/an _____ angle.

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IMPORTANT

MATHEMATICS TEXTBOOK FOR CLASS VI>Chapter 5 - Understanding Elementary Shapes>EXERCISE 5.4>Q 7

An angle whose measure is the sum of the measures of two right angles is a/an _____ angle.

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IMPORTANT

MATHEMATICS TEXTBOOK FOR CLASS VI>Chapter 5 - Understanding Elementary Shapes>EXERCISE 5.4>Q 7

When the sum of the measures of two angles is that of a right angle, then each one of them is _____ angle. (acute/obtuse/right/straight)

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IMPORTANT

MATHEMATICS TEXTBOOK FOR CLASS VI>Chapter 5 - Understanding Elementary Shapes>EXERCISE 5.4>Q 7

When the sum of the measures of two angles is that of a straight angle and if one of them is acute then the other should be _____. (acute/obtuse/right/straight)

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IMPORTANT

MATHEMATICS TEXTBOOK FOR CLASS VI>Chapter 5 - Understanding Elementary Shapes>EXERCISE 5.4>Q 8

Find the measure of the angle shown in each figure. (First estimate with your eyes and then find the actual measurement with a protractor).

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6th CBSE

IMPORTANT

MATHEMATICS TEXTBOOK FOR CLASS VI>Chapter 5 - Understanding Elementary Shapes>EXERCISE 5.4>Q 9

Find the angle measures between the hands of the clocks in each figure:

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IMPORTANT

MATHEMATICS TEXTBOOK FOR CLASS VI>Chapter 5 - Understanding Elementary Shapes>EXERCISE 5.4>Q 10

Investigate.
In the given figure, the angle measures $30 °$ . Look at the same figure through a magnifying glass.
Does the angle become larger? Does the size of the angle change?

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