NCERT Class 7 Mathematics

ANSWERS 299 EXERCISE 4.3 (a) y = 8 (b) t = 18 5 (c) a = –5 (d) q = – 8 (e) x = – 4 (f) x = 5 2 (g) m = 1 2 (h) z = –2 (i) l = ...

300 MATHEMATICS (i) ∠AOD,∠BOC (ii) ∠EOA,∠AOB (iii) ∠EOB,∠EOD (iv) ∠EOA,∠EOC (v) ∠AOB,∠AOE;∠AOE,∠EOD;∠EOD,∠COD EXERCISE 5.2 (i) ...

ANSWERS 301 EXERCISE 7.2 (a) SSS Congruence criterion (b) SAS Congruence criterion (c) ASA Congruence criterion (d) RHS Congrue ...

302 MATHEMATICS EXERCISE 9.1 (i) (^21212) ,, ,, 32537 (ii) (^358109) ,,, , 235 7 5 (iii) (^357) ,, (^343311) ,, 32 31 45 9 45 ...

ANSWERS 303 EXERCISE 9.2 (i) 3 2 (ii) 34 15 (iii) 17 30 (iv) 82 99 (v)^5726 (vi)^32 (vii)^3415 (i) 13 72 (ii) 23 63 (iii) 1 ...

304 MATHEMATICS 24.5 m; 1886.5 m^2 4. 132 m; Rs 528 5. 21.98 cm^2 4.71 m; Rs 70.65 7. 25.7 cm 8. Rs 30.14 (approx.) 9. 7 cm; 15 ...

ANSWERS 305 (f) 1.2ab–2.4b+3.6a 1.2ab 1.2,a,b –2.4b – 2.4, b 3.6a 3.6, a (g)^3144 x^34 x^34 ,x 1 4 1 4 (h) 0.1p^2 + 0.2q^2 0.1p^ ...

306 MATHEMATICS (v) 1 + x + xy x 1 xy y (vi) 12 xy^2 + 25 12 xy^212 y^2 (vii) 7 + xy^2 xy^2 y^2 (b) Expression Terms with y^2 Co ...

ANSWERS 307 (i) 8 (ii) 4 (iii) 0 5. (i) –2 (ii) 2 (iii) 0 (iv) 2 (i) 5 x – 13; –3 (ii) 8x– 1; 15 (iii) 11x – 10; 12 (iv) 11x + ...

308 MATHEMATICS (i) False; 10 × 10^11 = 10^12 and (100)^11 = 10^22 (ii) False; 2^3 = 8, 5^2 = 25 (iii) False; 6^5 = 2^5 × 3^5 ( ...

ANSWERS 309 (g) (h) (i) (j) (k) (l) (a) (b) (c) (d) (e) (a) Square (b) Triangle (c) Rhombus ...

310 MATHEMATICS (d) Circle (e) Pentagon (f) Octagon (a) 3 (b) 1 (c) 0 (d) 4 (e) 2 (f) 4 (g) 0 (h) 0 (i) 6 (j) Infinitely ma ...

ANSWERS 311 112 32 45 53 646 No, because one pair of opposite faces will have 1 and 4 on them whose total is not 7, and anoth ...

312 MATHEMATICS (ii) I have some five-rupee coins and some two-rupee coins. The number of two-rupee coins is twice the number of ...