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Mathematics Class 6 NCERT Solutions: Chapter 5 Understanding Elementary Shapes Exercise 5.4 β Part 1
Q.1 What is the measure of (i) a right angle? (ii) a straight angle?
(i) a right angle?
Answer:
A right angle is an angle of exactly (degrees) , corresponding to a quarter turn.
(ii) a straight angle?
Answer: A straight angle is an angle of .
Q. 2 Say True or False:
(a) The measure of an acute angle
Answer: True
(b) The measure of an obtuse angle .
Answer: False
(c) The measure of an reflex angle .
Answer: True
(d) The measure of on complete revolution .
Answer: True
(e) If .
Answer: True
Q. 3 Write down the measure of:
(a) Some acute angles
Answer:
(b) Some obtuse angles
Answer:
Q. 4 Measure the angles given below, using the protractor and write down the measure:
(a)
Answer:
(b)
Answer:
(c)
Answer:
(d)
Answer:
Q.5 which angle has a large measure? First estimate and then measure:
(a) Measure of angle A =
Answer:
(b) Measure of angle B =
Answer:
Has larger measure.