PSEB 6th Class Maths Solutions Chapter 8 Basic Geometrical Concepts Ex 8.4

Punjab State Board PSEB 6th Class Maths Book Solutions Chapter 8 Basic Geometrical Concepts Ex 8.4 Textbook Exercise Questions and Answers.

PSEB Solutions for Class 6 Maths Chapter 8 Basic Geometrical Concepts Ex 8.4

1. Write all the names of the following triangles in all orders:
PSEB 6th Class Maths Solutions Chapter 8 Basic Geometrical Concepts Ex 8.4 1
Solution:
(i) ∆ABC, ∆ACB, ∆BAC, ∆BCA, ∆CAB, ∆CBA.
(ii) ∆XYZ, ∆XZY, ∆YZX, ∆YXZ, ∆ZXY, ∆ZYX
(iii) ∆LMN, ∆LNM, ∆MNL, ∆MLN, ∆NML, ∆NLM.

PSEB 6th Class Maths Solutions Chapter 8 Basic Geometrical Concepts Ex 8.4

2. Write the name of vertices, sides and angles of the following triangles:
PSEB 6th Class Maths Solutions Chapter 8 Basic Geometrical Concepts Ex 8.4 2
Solution:

(i) (ii) (iii)
Vertices P, R, Q D, E, F T, P, S
Sides PR, QR, PQ DE, EF, DF TP, PS, TS
Angles \(\angle \mathrm{P}, \angle \mathrm{R}, \angle \mathrm{Q}\) \(\angle \mathrm{D}, \angle \mathrm{E}, \angle \mathrm{F}\) \(\angle \mathrm{T}, \angle \mathrm{P}, \angle \mathrm{S}\)

3. In the given figure, name the points that lie:
PSEB 6th Class Maths Solutions Chapter 8 Basic Geometrical Concepts Ex 8.4 3

Question (i)
On the boundary of ∆GEM
Solution:
Points on the boundary of AGEM are: G, A, E, C, M

PSEB 6th Class Maths Solutions Chapter 8 Basic Geometrical Concepts Ex 8.4

Question (ii)
In the interior of ∆GEM
Solution:
Points in the interior of AGEM are : P, X, D

Question (iii)
In the exterior of ∆GEM.
Solution:
Points in the exterior of AGEM are : Y, B.

4. In the given figure, write the name of:
PSEB 6th Class Maths Solutions Chapter 8 Basic Geometrical Concepts Ex 8.4 4

Question (i)
All different triangles
Solution:
All different triangles are :
∆AOD, ∆DOC, ∆BOC, ∆AOB, ∆ABD, ∆BCD, ∆ACD, ∆ABC

PSEB 6th Class Maths Solutions Chapter 8 Basic Geometrical Concepts Ex 8.4

Question (ii)
Triangles having O as the vertex
Solution:
Triangles having O as the vertex are :
∆AOB, ∆BOC, ∆COD, ∆AOD

Question (iii)
Triangles having A as the vertex.
Solution:
Triangles having A as the vertex are:
∆AOB, ∆AOD, ∆ABD, ∆ABC, ∆ACD.

5. Fill in the blanks of the following:

Question (i)
A triangle has …………… vertices.
Solution:
3

Question (ii)
A triangle has …………… angles.
Solution:
3

PSEB 6th Class Maths Solutions Chapter 8 Basic Geometrical Concepts Ex 8.4

Question (iii)
A triangle has ……………. sides.
Solution:
3

Question (iv)
A triangle divide the plane into ……………. parts.
Solution:
3

Question (v)
A triangle has …………… parts.
Solution:
6

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