Angle acb is congruent to dce angle b= 61 angle c= 57 angle d= 2x x=

4x 20 is 80 but if ther machine is broken then there is none you have to redo the test

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 !