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**NCERT solutions for Maths Understanding elementary Download as PDF**

## NCERT Solutions for Class 6 Maths Understanding elementary

**Class –VI **

**Mathematics **

**(Ex. 5.4)**

**Question** 1.What is the measure of (i) a right angle? (ii) a straight angle?

**Answer:**

(i) {tex}{90^ \circ }{/tex}

(ii) {tex}{180^ \circ }{/tex}

NCERT Solutions for Class 6 Maths Exercise 5.4

**Question** 2.Say True or False:

(a)The measure of an acute angle <{tex}{90^ \circ }.{/tex}

(b)The measure of an obtuse angle <{tex}{90^ \circ }.{/tex}

(c)The measure of a reflex angle >{tex}{180^ \circ }.{/tex}

(d)The measure of on complete revolution= {tex}{360^ \circ }.{/tex}

(e)If {tex}m\angle {/tex}A = {tex}53^\circ {/tex} and {tex}m\angle {/tex}B = {tex}35^\circ ,{/tex} then {tex}m\angle {/tex}A >{tex}m\angle {/tex}B.

**Answer: **(a) True, (b) False, (c) True, (d) True, (e) True

**Question** 3.Write down the measure of:

(a) some acute angles (b) some obtuse angles

(give at least two examples of each)

**Answer:**

(a) {tex}35^\circ ,20^\circ {/tex}

(b) {tex}110^\circ ,135^\circ {/tex}

**Question** 4.Measure the angles given below, using the protractor and write down the measure:

**Answer:**

(a) {tex}40^\circ {/tex}

(b) {tex}130^\circ {/tex}

(c) {tex}{90^ \circ }{/tex}

(d) {tex}{60^ \circ }{/tex}

NCERT Solutions for Class 6 Maths Exercise 5.4

**Question** 5.Which angle has a large measure? First estimate and then measure:

Measure of angle A =

Measure of angle B =

**Answer: **{tex}\angle {/tex}B has larger measure.

{tex}\angle {/tex}A = {tex}40^\circ {/tex} and {tex}\angle {/tex}B = {tex}65^\circ {/tex}

**Question** 6.From these two angles which has larger measure? Estimate and then confirm by measuring them:

**Answer: **Second angle has larger measure.

NCERT Solutions for Class 6 Maths Exercise 5.4

**Question** 7.Fill in the blanks with acute, obtuse, right or straight:

(a)An angle whose measure is less than that of a right angle is ________________.

(b)An angle whose measure is greater than that of a right angle is ________________.

(c)An angle whose measure is the sum of the measures of two right angles is ________________.

(d)When the sum of the measures of two angles is that of a right angle, then each one of them is ________________.

(e)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 ________________.

**Answer: **(a) acute angle, (b) obtuse angle, (c) straight angle, (d) acute angle, (e) 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).

**Answer:**

(i){tex}{30^ \circ }{/tex}

(ii) {tex}{120^ \circ }{/tex}

(iii) {tex}{60^ \circ }{/tex}

(iv) {tex}{150^ \circ }{/tex}

NCERT Solutions for Class 6 Maths Exercise 5.4

**Question** 9.Find the angle measure between the hands of the clock in each figure:

**Answer: **

(i){tex}{90^ \circ }{/tex} (Right angle)

(ii) {tex}{30^ \circ }{/tex} (Acute angle)

(iii) {tex}{180^ \circ }{/tex} (Straight angle)

**Question** 10.Investigate:

In the given figure, the angle measure {tex}{30^ \circ }.{/tex} Look at the same figure through a magnifying glass. Does the angle becomes larger? Does the size of the angle change?

**Answer:** No, the measure of angle will be same.

NCERT Solutions for Class 6 Maths Exercise 5.4

**Question** 11.Measure and classify each angle:

Angle | {tex}\angle {/tex}AOB | {tex}\angle {/tex}AOC | {tex}\angle {/tex}BOC | {tex}\angle {/tex}DOC | {tex}\angle {/tex}DOA | {tex}\angle {/tex}DOB |

Measure | ||||||

Type |

**Answer:**

Sol.

Angle | {tex}\angle {/tex}AOB | {tex}\angle {/tex}AOC | {tex}\angle {/tex}BOC | {tex}\angle {/tex}DOC | {tex}\angle {/tex}DOA | {tex}\angle {/tex}DOB |

Measure | {tex}{40^ \circ }{/tex} | {tex}{130^ \circ }{/tex} | {tex}{90^ \circ }{/tex} | {tex}{90^ \circ }{/tex} | {tex}{140^ \circ }{/tex} | {tex}{180^ \circ }{/tex} |

Type | Acute | Obtuse | Right | Right | Obtuse | straight |

## NCERT Solutions for Class 6 Maths Exercise 5.4

NCERT Solutions Class 6 Maths PDF (Download) Free from myCBSEguide app and myCBSEguide website. Ncert solution class 6 Maths includes text book solutions from Class 6 Maths Book . NCERT Solutions for CBSE Class 6 Maths have total 14 chapters. 6 Maths NCERT Solutions in PDF for free Download on our website. Ncert Maths class 6 solutions PDF and Maths ncert class 6 PDF solutions with latest modifications and as per the latest CBSE syllabus are only available in myCBSEguide.

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