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\\November 23, 2023 5:09 PM Surender Prajapati Proof 5 Reader _________________________ Date: ___________________74

2. (a) 41.97 (b) 63.21 (c) 99.35 kg (d) `83.58 4. (a) ∠AOB, ∠BOC and ∠AOC
(e) 8.576 L (f) 25.855 cm (b) ∠RPS, ∠RPT, ∠RPQ, ∠SPT, ∠SPQ and ∠TPQ
3. (a) 1.7 (b) 0.356 (c) 18.897 (d) 12.2433 5. (a) A, E, B, F, G, C (b) H, I (c) K, J
(e) 109.615 (f) 19.84 (g) 0.744 (h) 0.621 Practice Time 6C
(i) 123.755
4. (a) 9.24 (b) 0.19 (c) 4.064 (d) 19.052 km 1. (a) 25° (b) 60° (c) 140° (d) 165° (e) 220° (f) 90°
2.
(e) 0.817 mL (f) 172.075 kg (g) `25.5 (h) 0.496 km (a) 65° (b) 110° (c) 90° (d) 105°
5. 0.42 6. 13.80 7. 131.3 8. `75 3. Do it yourself.
9. 62.9 m 10. 93.76 kg 11. 20.05 kg Practice Time 6D
Practice Time 5E 1. (a) Acute angle (b) Right angle (c) Obtuse angle
1. (a) 8 (b) 76 (c) 138 (d) 157.5 (e) 456.7 (f) 45.7 (d) Straight angle
(g) 6543 (h) 6560 (i) 27006 2. (a) Acute angle (b) Obtuse angle (c) Obtuse angle
2. (a) 388.8 (b) 280.4 (c) 899.91 (d) 10.305 (d) Straight angle (e) Right angle (f) Complete angle
(e) 10283.4 (f) 43786.4 (g) 2340.855 (h) 5053.75 (g) Acute angle (h) Obtuse angle (i) Acute angle (j) Reflex angle
(i) 366 (j) 5093.4 (k) 15668.64 (l) 54.87 3. (a) Complete angle (b) Right angle
3. (a) 0.54 (b) 6.36 (c) 45.76 (d) 421.05 (c) Straight angle (d) Reflex angle (e) Acute angle
(e) 8.4012 (f) 12.0972 (g) 0.24 (h) 0.01 (f) Reflex angle (g) Right angle (h) Acute angle
4. (i) `142 (ii) `163 (iii) `195 5. `106.25 4. (a) ∠DEF – acute angle (b) ∠ABC – straight angle
Practice Time 5F (c) ∠XYZ – Right angle (d) ∠MNO – Reflex angle
1. (a) 0.564 (b) 5.36 (c) 63.54 (d) 0.056 Practice Time 6E
(e) 0.123 (f) 3.545 (g) 0.005 (h) 2.354 1. (a)–(iii) (b)–(ii) (c)–(iv) (d)–(ii) (e)–(ii)
(i) 0.364 (j) 0.087 (k) 0.0035 (l) 0.0005 2. (a) A, B and C
2. (a) 0.93 (b) 0.197 (c) 7 (d) 12 (b) ∠ABC or ∠CBA or ∠B, ∠BAC or ∠CAB or ∠A, ∠ACB or ∠BCA or ∠C
(e) 0.214 (f) 100.32 (g) 266.53 (h) 1.88 (c) AB, BC and CA
3. 37.44 kg 4. 6.736 m 5. 0.270 kg 3. (a) Scalene triangle (b) Equilateral triangle (c) Isosceles triangle
Brain Sizzlers (d) Obtuse-angled triangle (e) right-angled triangle
0.254 (f) Obtuse-angled triangle
Mental Maths Practice Time 6F
1. (a) 2. (a) 3. (c) 4. (c) 5. (a) 1. (a) O (b) AB (c) OA, OB, OP (d) CD, AB
Chapter Assessment (e) A, P, D, B, C (f) R, Q (g) M, N, O (h) 2 (i) chord
1. (a) –(iii) (b) –(i) (c) –(ii) (d) –(iv) 2. (j) diameter AB (d) True (e) False (f) True
(b) True (c) False
(a) False
2. 4.705 litres 3. 12 bottles 5. 08 13 12 3. (a) 5 cm (b) 6 cm (c) 22 mm (d) 16 cm
.
.
.
15 11 07 4. (a) 3 cm (b) 4.5 cm (c) 11.5 mm (d) 8 mm
.
.
.
.
.
10 09 14 Mental Maths
.
∠ABC = 45°, ∠PQR = 30°, ∠STU = 255°, ∠RST = 120°, ∠DEF = 90°
6. 324.28 kg 7. Sameer performed better 8. 5.69 km
∠PQR < ∠ABC < ∠DEF < ∠RST < ∠STU
Chapter 6: Geometry Brain Sizzlers
Let’s Recall  1 °
2
1. Edge of pencil, edge of mobile, edge of blackboard, edge of book, etc. 1.   7  or 7.5° 2. 3
2. Pizza slices, traffic signs, sandwich slices, nachos, etc.
3. Blackboard, top of table, ruler, playing card, etc. Chapter Assessment
(c)–(iv)
4. Bangles, coins, whole pizza, dart board, etc. 1. (a)–(iii) (b)–(iv) (d)–(i)

,
,
,
Practice Time 6A 2. (a) A, B, C, D, O (b) OA OB OC OD (any three)

1. (a)–(i) (b)–(iii) (c)–(ii) (c) AB BC CD DA, , , (d) BD AC,
2. (a) point (b) ray (c) line (d) two (e) Intersecting lines
,
,
,
,
,
,
,
,
,
(f) Parallel lines 3. AB BC CD DE AC AD AE BD BE CE (any five)












3. Do it yourself. 4. (a) a and , a and , a and , a and , a and , b and ,

c
r
b
q
r
p
4. (a) Line AB or AB (b) Line QP or QP          
b and , b and , c and , c and , c and r
p
q
p
q
(c) line segment ST or ST (d) Line EF or EF    
  c
(e) Intersecting lines AB and CD (f) Parallel lines l and m or l||m (b) b || and p || q
(g) Intersecting lines p and q (h) Parallel lines s and t or s || t 5. (a) ∠AOB + ∠BOC (b) ∠AOB + ∠COD

5. (a) A, P, B, Q (b) AB (c) None (c) ∠BOC + ∠COD  (d) ∠AOB + ∠BOC + ∠COD






(d) PA PB PQ, , 6. (a) parallel line: l || n , Intersecting lines: l and pn, and p




6. (a) parallel (b) parallel (c) intersecting (d) intersecting (b) parallel line: qr|| , Intersecting lines: p and  q r and  s p and  s
,
,
(e) intersecting (f) coinciding     

,
,
7. XY YZ (c) parallel line: ab|| , Intersecting lines: a and c b and c
Practice Time 6B 7. (a) DPQS, DSQR and DPQR
(b) ∠PQR, ∠PQS, ∠SQR, ∠SRQ, ∠PSQ, ∠RPQ, ∠RSQ
1. (b), (d)
2. (a) ∠PQR (b) ∠XYZ (c) ∠LMN (d) ∠EFG (c) PQ QS QR SR PS PR, , , , ,
(d) DPSQ and DQSR
3. Arms Vertex Name of the angle

Model Test Paper – 1
,
(a) OP OT O ∠POT A. 1. (b) 2. (d) 3. (b) 4. (c) 5. (a) 6. (b)

,
(b) US UN U ∠SUN 7. (d) 8. (c) 9. (b) 10. (c)
B. 1. obtuse 2. equilateral 3. circle 4. 12.3321.

,
(c) OT OP O ∠TOP 5. 23
C. 1. True 2. False 3. True 4. False 5. True
268 Mathematics-5