# Maths Wiz Solutions Class 7 Chapter 9

## Maths Wiz Class 7 Solutions Chapter 9 Basic Geometric Figures

Welcome to NCTB Solutions. Here with this post we are going to help 9th class students for the Solutions of Maths Wiz Class 7 Math Book, Chapter 9, Basic Geometric Figures. Here students can easily find step by step solutions of all the problems for Basic Geometric Figures, Exercise 9A, 9B, 9C and 9D Also here our mathematics teacher’s are solved all the problems with easily understandable methods with proper guidance so that all the students can understand easily. Here in this post students will get chapter 9 solutions. Here in this post all the solutions are based on ICSE latest Syllabus.

Basic Geometric Figures Exercise 9B Solution :

Question no – (2)

Solution :

As per the question,

AB = 8.2 cm and from it cut off a segment AC of length 3.7 cm

Required figure, Measure of the remaining segment,

AB = 8.2 cm

AC = 3.7 cm

CB = 4.5 cm

Question no – (3)

Solution :

As per the question,

line segment PQ = 7.2 cm.

Required figure, AB = 7.cm

AO = 3.6 cm

BO = 3.6 cm

Question no – (4)

Solution :

According to the question,

Line segment EF of length 7.2 cm and divide into 3 equal parts.

The two points of division as G and H.

Required figure, Measures :

EF = 7.2 cm

EG = 2.4 cm

GH = 2.4 cm

HF = 2.4 cm

Question no – (5)

Solution :

As per the given question,

Line segment LM = 8 cm.

Mark three points of division on it it as A, B, C

Required figure, Measures :

LM = 8 cm

LA = 2 cm

AB = 2 cm

BC = 2 cm

CM = 2 cm

Basic Geometric Figures Exercise 9C Solution :

Question no – (1)

Solution :

Figure – (a) All angles are =  ∠ABC, ∠CBA, ∠B

Figure – (b) All angles are = ∠q, ∠PQR ∠RQP

Figure – (c) All angles are =  ∠M, ∠LMR, ∠RML

Question no – (2)

Solution :

Name of six angles in the diagram that have O as a vertex are,

∠AOB, ∠BOC, ∠COD, ∠AOD ∠AOC, ∠BOD

Question no – (3)

Solution :

(a) the interior of ∠U.

= A,B

(b) the exterior of ∠U.

= P, Q

(c) that lie on ∠U.

= S, U, T

Question no – (4)

Solution :

Total angle = 360°

POS + QOR + ROS + SOP = 360°

4 POQ = 360 [∵ POQ = QOR = ROS SOP]

or, POQ = 360/4 = 90°

Therefore, Each angles = 90°

Question no – (5)

Solution :

(a) From N to E

= 90°

(b) From N to S

= 180°

(c) From N to NE

= 45°

(d) From NE to W

= 225°

(e) From NW to SE

= 180°

(f) From NW to SW

= 270°

Question no – (6)

Solution :

A circle of clock = 360°

Numerals Indicating how’s = 12

= 360/12

= 30°

Therefore, the measure of the angle will be 30°

Question no – (7)

Solution :

Measure of figure – (a) = 90°

Measure of figure – (b) = 135°

Measure of figure – (c) = 60°

Measure of figure – (d) = 180°

Measure of figure – (e) = 125°

Measure of figure – (f) = 30°

Question no – (8)

Solution :

(a) Angle measure 60° (b) Angle measure 80° (c) Angle measure 120° (d) Angle measure 170° (e) Angle measure 30° (f) Angle measure 150° (g) Angle measure 105° (h) Angle measure 45° Basic Geometric Figures Exercise 9D Solution :

Question no – (1)

Solution :

(a) Figure of a right angle (b) Figure of an acute angle (c) Figure of an obtuse angle (d) Figure of a straight angle (e) Figure of a reflex angle (f) Figure of a complete revolution Question no – (2)

Solution :

Name of the figure – (a) straight Angle.

Name of the figure – (b) Acute angle.

Name of the figure – (c) right angle.

Name of the figure – (d) obtuse angle.

Name of the figure – (e) reflex angle.

Name of the figure – (f) acute angle.

Name of the figure – (g) complete angle.

Name of the figure – (h) right angle.

Name of the figure – (i) abstruse angle.

Name of figure – (j) Acute angle.

Name of figure – (k) reflex angle.

Name of figure – (l) Complete angle.

Question no – (3)

Solution :

A = obtuse angle.

B = obtuse angle.

C = Acute angle.

D = obtuse angle.

∠E = obtuse angle.

F = acute angle.

Question no – (4)

Solution :

Figure – (a)

Time shown = 12 : 15 P.M

Angle form = acute angle.

Figure – (b)

Time shown = 6 : 05 P.M

Angle form = = obtuse angle.

Figure – (c)

Time shown = 1: 00 P.M

Angle form = acute angle.

Question no – (5)

Solution :

(a) 4o’ clock forms obtuse angle.

(b) 3:05 a.m. forms acute angle.

(c) 4 : 30 forms acute angle.

(d) 6.O’ clock forms straight angle.

(e) 2 : 35 forms obtuse angle.

(f) 7 : 55 p.m. forms obtuse angle.

(g) 11 o’ clock forms acute angle.

(h) 11 o’ clock forms complete angle.

(i) 20 min past 5 forms acute angle.

(j) 5 : 10 forms right angle.

Next Chapter Solution :

Updated: June 17, 2023 — 11:24 am