Area of Irregular Shapes
Aligned To Common Core Standard:
Grade 6 Geometry - 6.G.A.1
How to Approach Finding the Area of Irregular Shapes - While there are many symmetrical shapes in geometry, you will find many asymmetrical shapes too. These are called irregular shapes. Irregular shapes are the polygons having five or more sides of varying lengths. But the hardest part is to find out the area of these odd shapes. In order to learn how we can go about finding the areas of these shapes, let's look at the following steps. The first approach is to decompose these shapes into triangles, squares, quadrilaterals or any other shape to form a regular shape. To evaluate such shapes, you can divide the shapes into unit squares. The total number of unit squares that fall within the shape determines the area of the figure. If you have shaded unit squares, count squares as 1 if the shaded region is more than half the square. Divide the irregular shape into two or more regular shapes to find the area. Use curves to divide the irregular shapes into regular shapes. Using dividing techniques, you can easily find the area of odd shapes that are a part of geometry. These worksheets and lessons help students understand how to find indirect area of shapes and various locations.
Printable Worksheets And Lessons
- Area of a Double Rectangle Step-by-step Lesson- We give you an "L" shape and ask you to break it into two rectangles to determine the area.
- Guided Lesson - You will work on the area of two triangles and an odd rectangle series.
- Guided Lesson Explanation - I think this is a good outline to help students really understand the concept of area.
- Practice Worksheet - I add perimeter and area comparisons. I see these types of questions on a number of national exams.
- Area of Polygons and Circles Five Pack - The focus here is on more standard shapes.
- Perimeter Matching Worksheet - Sorry about that. Perimeter does fall under this standard too.
These are the types of problems professional contractors deal with daily.
- Homework 1 - What is the area of this triangle? As long as you account for all the measures, you are all good.
- Homework 2 - What is the area of this figure? These are common problems you will come across when working in construction.
- Homework 3 - Which figure has a greater perimeter? Remind yourself that these are all not to scale.
These are the types of problems that teachers work with daily.
Math Skill Quizzes
Students should hopefully sail through these.
- Quiz 1 - All quizzes are a mixed review in this section. You will do some comparisons and calculations.
- Quiz 2 - Which figure has a greater perimeter?
- Quiz 3 - More perimeter problems for you to tackle. I would recommend checking things off as you go.
Why Is This Skill Important?
Almost all forms building or construction projects involve this skill at some point. Whether it be during the initial architectural design or if a client asks them to add a closet somewhere on the blueprint. The architect can only work with the area that the original design calls for. When the construction begins they will often run into problems based on the wiring, heating, and cooling of the house. They may need to shimmy something around, once built it may not look the best, or there might be a piece of furniture or kitchen appliance that requires changes to be made. In the medical field computers and radiologists are performing similar calculations to determine the size of unknown growths in their patient’s bodies. Understanding the shape and being able to detect and track these growths are often key to staying healthy.