Cut the figure into rectangles, triangles and half circles and add their areas, or take the whole rectangle and subtract the piece that is missing. Perimeter goes round the outside only; an L-shape has the same perimeter as the rectangle it was cut from.
Adding the notch instead of subtracting it, and on a semicircle, forgetting to halve the circle.
Also called compound shapes, irregular figures, shaded regions or area of composite shapes.
What you can put on this worksheet
Area of a composite figure
Find the area→ 110
Perimeter of a composite figure
Find the perimeter→ 50
Questions about these worksheets
Yes. Every area of composite figures sheet is free to print and free to download as a PDF. There is no account to make, no email to hand over and no limit on how many you take.
Yes. The answer key prints on a second page, and you can choose whether it shows each question beside its answer or just the answers in a list.
Yes. Print straight from the page, or download the PDF and print that. The sheet is laid out for paper rather than squeezed off a screen, so there is room to work under each question, and the answer key comes out on its own page.
Pre-Algebra is usually taken around 7th or 8th grade, though schools vary and plenty of students meet it earlier or later. Pick the difficulty rather than the grade: the easy level suits a first lesson on it, the hard level suits review before a test.
Yes, as many as you like. The questions are built fresh each time rather than picked from a fixed set of files, so pressing Generate gives a new sheet. That is what you want for a second class, a retake, or two students sitting next to each other.
That is the closest comparison, and Kuta Software is good software. It is also paid software you install on a computer. These worksheets run in a browser tab for free, with no account and nothing to install. Like Kuta, the area of composite figures questions are generated when you ask for them rather than pulled from a fixed set of files, so two classes never get the same sheet, and the answer key comes with it.
Yes. There are two levels, and you can tick more than one for a sheet that mixes them, in which case the questions come out easiest first. The harder levels are not just larger numbers: they ask for something the easy ones do not.
You pick from 2: area of a composite figure and perimeter of a composite figure. Tick as many as you want and set how many of each, or let it spread them evenly.
Adding the notch instead of subtracting it, and on a semicircle, forgetting to halve the circle.