Area of 2D Shapes – so many rules and formulas to remember!
It’s often difficult for students to remember all of the formulas and rules when it comes to finding the area of 2D shapes, so these posters are here to help. Blow them up, cut out the shapes and then laminate them for a colorful and informative visual reminder of area procedures.
2D Shapes include:
- Non-Right-Angled Triangles
- Right-Angled Triangles
- Compound Shape
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Common Core State Standards alignment
Recognize area as an attribute of plane figures and understand concepts of area measurement....
A square with side length 1 unit, called "a unit square," is said to have "one square unit" of area, and can be used to measure area....
Find the area of a rectangle with whole-number side lengths by tiling it, and show that the area is the same as would be found by multiplying the side lengths....
Solve real world and mathematical problems involving perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the sam...
Apply the area and perimeter formulas for rectangles in real world and mathematical problems. For example, find the width of a rectangular room given the area of the flooring and the length, by viewing the area formula as a multiplication equation wi...
Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines, or the presence or absence of angles of a specified size. Recognize right triangles as a category, and identify right triangles....
Evaluate expressions at specific values of their variables. Include expressions that arise from formulas used in real-world problems. Perform arithmetic operations, including those involving whole-number exponents, in the conventional order when ther...
Find the area of right triangles, other triangles, special quadrilaterals, and polygons by composing into rectangles or decomposing into triangles and other shapes; apply these techniques in the context of solving real-world and mathematical problems...
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