Mark cuts a piece of cardboard in the shape shown below.

He plans to cut another piece of cardboard in the same shape. The length of the sides AB and DC of the new piece of cardboard are tripled, and the length of the side AD is doubled. What is the area of the new cardboard piece?
Answer
six times the area of the original cardboard piece
four times the area of the original cardboard piece
five times the area of the original cardboard piece
three times the area of the original cardboard piece

Question

Mark cuts a piece of cardboard in the shape shown below.



He plans to cut another piece of cardboard in the same shape. The length of the sides AB and DC of the new piece of cardboard are tripled, and the length of the side AD is doubled. What is the area of the new cardboard piece?
Answer
		six times the area of the original cardboard piece
		four times the area of the original cardboard piece
		five times the area of the original cardboard piece
		three times the area of the original cardboard piece

anonymous · Answer

attachment

auctoratrox · Answer

the answer is 6 times the area of the original piece. do you understand how I got this?

anonymous · Answer

Yes, actually i used common sense to figure it out and i got the same answer! ty.

auctoratrox · Answer

you can also use the formula for the area of a trapezoid then put in 2h for h and 3b for both bases.

anonymous · Answer

ah, ok. I did mines alittle different then that.