Question

CAN ANYONE PLEASE HELP ME PLSS ANSWER MY QUESTION PLSS ​

Answer 1

Answer:

1. No, A polyhedron must follow the Euler's formula i.e. F+V-E = 2. As we can see clearly, Euler's formula is not getting obeyed in the question. Hence, its not possible.

2. 2x(z-x-y) + 2y(z-y-x) = (z-y-x)(2x+2y) = 2(x+y)(z-x-y)

3. Use the formula of (a+b)² = a² + 2ab + b² :

(7a-9b)(7a-9b)

= (7a-9b)²

= (7a)² - (2×7a×9b) + (9b)²

= 49a² - 126ab + 81b²

4. According to Euler's formula, E = F+V-2 = 20+12-2 = 30

5.½×16×d = 240 => 16d = 240×2 => d = (240×2)/16 = 30 cm

Hope it helps u dear...☺️☺️