Question

12. (a + b)² is equal to

(a) a² + b² – 2ab (b) a² + b² + 2ab (c) a² + b² (d) 2ab

13. (a – b)² is equal to

(a) a² + b² – 2ab (b) a² + b² + 2ab (c) a² + b² (d) 2ab.

14. How many faces does a cuboid have?

(a) 2 (b) 4 (c) 6 (d) 3

15. How many vertices does a cuboid have ?

(a) 4 (b) 6 (c) 8 (d) 3​

Answer 1

Answer:

12. b)

13.a)

14. c)

15.c)