Page 367 - Math_Genius_V1.0_C7_Flipbook

E:\Working\Focus_Learning\Math_Genius-7_(12-11-2024)\Open_File\Answer\Answer
\ 29-Jan-2025 Surender Prajapati Proof-6 Reader’s Sign _______________________ Date __________

Brain Sizzlers
Angle of rotation = 90°
Order of rotational symmetry = 4
(c) (d)
Unit Test – 3
A. 1. (c) 2. (d) 3. (a) 4. (b) 5. (a)
6. (c) 7. (b) 8. (a) 9. (c) 10. (d)
3. (a) 3 (b) 2 (c) 4 (d) 2
B. 1. 24 2. 8 3. 13 : 300 4. 9 5. 2
4. S. No. Lines of Symmetry Order of Rotational Symmetry C. 1. T 2. T 3. F 4. T 5. F
D. 1. H, I, O.
(a) 0 3
2. (a) 59:28 (b) 7 : 6, 59 : 28 is the greater ratio.
(b) 0 2 3. 1845
(c) 1 1 4. Order of rotational symmetry = 4.
(d) 3 3 5. 4 8 % 6. 5 5 % profit 7. 120 m
(e) 2 2 23 19

5. (a) (b) (c) 8. (a) (b)

6. 360°, 180° 7. H, I

Chapter 12: Visualising Solid Shapes

8. , yes , yes Let’s Recall
1. Shapes Objects
Wooden
Cuboid Bricks Cardboard Books Mattress
9.
Cone Funnel Traffic cone Birthday cap Ice cream
cone
Cylinder Drum Battery cell Marker Tin can
Sphere Basketballs Golf balls Peas Cherries
Think and Answer
Yes
Quick Check

Practice Time 12 A
1. Number of Number of Number of
Faces Vertices edges
Cube 6 8 12
Cuboid 6 8 12

Cylinder 3 0 2
Cone 2 1 1
Sphere 1 0 0
Triangular Prism 5 6 9
Square Pyramid 5 5 8
Triangular Pyramid 4 4 6
2. (a) - (ii) (b) - (vi) (c) - (iv) (d) - (i)
(e) - (v) (f) - (iii)
10. 1. Three 2. Three 3. (a) EF (b) EFBA, FGCB (c) AEHD, AEFB, ADCB
3. Rana is correct, Order of rotational symmetry is 3. (d) Vertex D (e) CD, EF, HG (f) AE, AD, BF, BC

365 Answers