Finding the Area of Irregular Figures
This Finding the Area of Irregular Figures lesson plan also includes:
Young scholars estimate the areas of highly irregular shapes and use a process of decomposition to calculate the areas of irregular polygons.
43 Views 62 Downloads CCSS: Designed
Areas of Geometric Shapes with the Same Perimeter
A triangle, square, hexagon, and circle all have a perimeter of one unit. Eighth graders must attempt to find the area of each and arrange them in order from least to greatest areas. A terrific task for applying four different area...
7th - 9th Math CCSS: Designed
Determining Perimeter and Area of Polygons on the Coordinate Plane
That shape is so weird, there's no way to find its area! Show your classes that they can use grids and known formulas to find the perimeters and areas of irregular figures. Pairs develop methods to break irregular figures into figures...
6th Math CCSS: Designed
Study Jams! Area of Irregular Figures
Painting an irregular figure can be tricky if we don't know the exact area. This interactive presentation reveals that irregular figures can be broken into smaller, simple figures that use the area formulas. Go through two examples,...
5th - 8th Math CCSS: Adaptable
Find Surface Area of Cubes and Prisms by Pulling them Apart
With all those sides, finding surface area can confusing. This video uses color-coded visuals to show the measurements of each side before adding them all together. Show your mathematicians that wrapping a gift requires surface area to...
5 mins 6th - 8th Math CCSS: Designed
Find the Area of Polygons by Decomposing into Triangles, Rectangles, Parallelograms, and Trapezoids
Take a multi-sided figure, such as a pentagon, and break it into smaller shapes to calculate the area. The video demonstrates this idea visually by breaking figures into small pieces and calculating each area. Also included, is a review...
6 mins 5th - 7th Math CCSS: Designed
Find the Area of a Parallelogram by Decomposing
Using the area formula makes sense, but what about when finding the area of a parallelogram? The slanted figure is decomposed in the video to show how it still applies the area formula of base times height. The video addresses common...
4 mins 5th - 7th Math CCSS: Designed