We found 1,061 resources with the concept perimeter
Area and Perimeter of Triangles: Lesson
3 mins 6th - 10th CCSS: Adaptable
New ReviewGo from a parallelogram to a triangle. A segment of an extensive playlist on basic geometry shows the derivation of the formula for the area of a triangle. The resource works examples that require finding a missing side or height to...
Area and Perimeter of Rhombuses and Kites: Lesson
4 mins 6th - 10th CCSS: Adaptable
New ReviewFlip the triangles up and create a parallelogram. Using the idea of transformations, the video develops the area formula for rhombi and kites. The segment of an extensive geometry playlist uses the formula to find the areas of different...
Area and Perimeter of Trapezoids: Lesson
4 mins 6th - 11th CCSS: Adaptable
New ReviewWith a little averaging, a trapezoid becomes a parallelogram. The section of an extensive geometry playlist shows how to derive the formula for the area of a trapezoid by changing it into a parallelogram. Using the formula, the video...
Area and Perimeter of Rectangles: Lesson
3 mins 4th - 9th CCSS: Adaptable
New ReviewAround and in—take a different look at rectangles. A portion of a basic geometry playlist discusses the area and perimeters of rectangles. Using the formulas, the presentation works perimeter and area examples with rectangles and squares.
Area and Perimeter of Similar Polygons: Lesson
3 mins 7th - 11th
New ReviewFind the square of the scale factor. A component of a large playlist on geometry discusses the ratios of the perimeters and areas of two similar polygons. The resource shows examples in finding the ratios that lead to a pattern.
Go with Green Triangles—Linking Length, Perimeter, Area, and Volume
6th - 8th CCSS: Designed
Investigate and compare scale factors of perimeter and area. Young scholars use an applet to manipulate the sides of similar rectangles. They then make perimeter and area calculations and compare the ratios to finish the second in a...
In Search of Perfect Squares—Visualizing Squares and Square Roots
6th - 8th CCSS: Designed
It's hip to be square! The first of a two-lesson series combines computer simulation and physical manipulation to illustrate perfect squares. Partners use geoboards to measure the length of sides, perimeter, and area of squares....
How Does Scale Factor Affect the Areas and Perimeters of Similar Figures
9th - 12th CCSS: Designed
Are all the measurements scalable? Pupils work in groups or alone to determine whether figures are similar and find any missing side lengths. Then, they calculate the perimeters and areas of the figures. Finally, using the measurements,...