Question #70458 Geometry Perimeter, Area, and Volume Perimeter and Area of Non-Standard Shapes 1 Answer George M. ยท Stefan V. Feb 6, 2018 b = "28 m" Explanation: Let a be the height of the movie screen and b the width. Then, the perimeter of the rectangle is P=2(a+b) The perimeter is "80 m", so 80=2(a+b) 40=a+b But the height is "12 m", so 40=12+b b=28 Answer link Related questions A rectangle is 12cm longer than its wide. It's perimeter is 68m, how do you find it's length and width? If the area of a square is 225 cm2, what is perimeter? How do you find the perimeter and area of a square with side 6 1/2 in? The length of a rectangle is 3 times its width. If the area of the rectangle is "192 in"^2,... A square has a perimeter of 36 inches. What is the area? If a semi circle has a diameter of 4cm then what is the perimeter? A painting measures 12 inches by 16 inches and is surrounded by a frame of uniform width around... A clear plastic prism has six faces, each of which is a parallelogram of side length 1 meter. A... How do you find the area of a trapezoid when you have the length of every side but not the height? The area of a trapezoid is equal to half of the product of the height and sum of the bases. How... See all questions in Perimeter and Area of Non-Standard Shapes Impact of this question 1288 views around the world You can reuse this answer Creative Commons License