Pienso en un numero le saque tercera luego le sume 8 y obtuve como resultado 17 ¿cual es el numero que pense?

Arectangle is a quadrilateral and a parallelogram.here is all that apply to a rectangle!

Volume is length times width times height so
20 times 8 times 30 which is 4,800
surface area is ph (p is perimeter of base), h is height.
so perimeter would be length+length+width+width so 20+20+8+8 which is 56. so multiply 56 times 30 which is 1680. hope this !