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:
Solution:
(i) ∆ABC, ∆ACB, ∆BAC, ∆BCA, ∆CAB, ∆CBA.
(ii) ∆XYZ, ∆XZY, ∆YZX, ∆YXZ, ∆ZXY, ∆ZYX
(iii) ∆LMN, ∆LNM, ∆MNL, ∆MLN, ∆NML, ∆NLM.
2. Write the name of vertices, sides and angles of the following triangles:
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:
Question (i)
On the boundary of ∆GEM
Solution:
Points on the boundary of AGEM are: G, A, E, C, M
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:
Question (i)
All different triangles
Solution:
All different triangles are :
∆AOD, ∆DOC, ∆BOC, ∆AOB, ∆ABD, ∆BCD, ∆ACD, ∆ABC
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
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