SOLUTION: from a 10cm by 20cm rectangular cardboard, a square with side length 8cm is cut. what is the perimeter of the shaded part? there is a figure but i can't put here...

Algebra ->  Customizable Word Problem Solvers  -> Geometry -> SOLUTION: from a 10cm by 20cm rectangular cardboard, a square with side length 8cm is cut. what is the perimeter of the shaded part? there is a figure but i can't put here...       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 785484: from a 10cm by 20cm rectangular cardboard, a square with side length 8cm is cut. what is the perimeter of the shaded part?

there is a figure but i can't put here...
Answer by Trontor(4) About Me  (Show Source):
You can put this solution on YOUR website!
Well, you have 2 Shapes, a rectangle, and a square. The square is within the rectangle, and I will assume the "shaded" part is the area of the rectangle without the square.
So, basically, you need to find out the sides of the large rectangle and then add the sides of the square.
Perimeter of Rectangle = 10 + 10 + 20 + 20
+P1+=+2%2A10+%2B+2%2A20
+P1+=+20+%2B+40+
+P1=+60
Now we add the perimeter of the square
which is +P+=+4s
P2+=+4%2A+8
P2+=+32
This makes the total perimiter
P+=+P1+%2B+P2
P+=+80+%2B+32
P+=+112

If you thought this answer was good, mark it as your solution.