Students can download Chapter 5 Understanding Elementary Shapes Ex 5.4 KSEEB Solutions for Class 6 Maths helps you to revise the complete syllabus.

## Karnataka State Syllabus Class 6 Maths Chapter 5 Understanding Elementary Shapes Ex 5.4

Question 1.

What is the measure of

(i) a right angle?

(ii) a straight angle?

Solution:

i) The measure of a right angle is 90°

ii) The measure of a straight angle is 180°

Question 2.

Say True or false:

a) The measure of an acute angle <90°

True

b) The measure of an obtuse angle <90° False c) The measure of reflex angle > 180°

True

d) The measure of one complete revolution = 360°

True

e) If m∠A = 53° and m∠B = 35°, then m∠A > m∠B.

True

Question 3.

Write down the measures of Some acute angles Some obtuse angles (given at least two examples of each)

Solution:

a) 45°, 70°

b) 105°, 132°

Question 4.

Measure the angles given below using the protractor and write down the measure.

Solution:

Solution:

Question 5.

Which angle has a large measure? First estimate and then measure.

Solution:

Measure of Angle A = 40°

Measure of Angle B = 68°

∠B has the greater measure than ∠A

Question 6.

From these two angles Which has largest measure? Estimate and then confirm by measuring them.

Solution:

The measures of these angles are 45° and 55° Therefore the angle shown in 2^{nd} figure is greater.

Question 7.

Fill in the blanks with acute, obtuse, right or straight:

a) An angle who se measure is greater than that of a right angle is __Acute angle__

b) An angle whose measure is greater than that of a right angle is __obtuse__

c) An angle Whose measure is the sum of the measures of two right angles is __Straight angle__

d) When the sum of the measure of two angles is that of a right angle, then each one of them is __Acute__

e) When the sum of the measures of two angles is that of a straight angle and it one of them is acute then the other should be __obtuse angle__

Question 8.

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

Solution:

The measures of the angle shown in the above figure are 40°, 130°,65°, 135° respectively.

Question 9.

Find the angle measure between the hands of the clock in each figure:

Solution:

Question 10.

Investigate

In the given figure, the angle measures 300. Look at the same figure through a magnifying glass. Does the angle becomes larger? Does the size of the angle change?

Solution:

The measure of this angle will not change

Question 11.

Measure and classify each angle.

Solution: