Khan Academy: Creating Rectangles With a Given Area 1

Given a rectangle with specified dimensions, third graders are prompted to create a new rectangle with the same area, but a different perimeter. This challenges learners to think about perimeter and area in a new way. Use...

Area is the amount of space that takes up the inside of a figure. To find the area of a rectangle, one must multiply the length by the width. Here, third graders are challenged to find the missing side length, given the area.

Practice finding the area of rectangles by counting unit square. Create rectangles with a given area by covering unit squares. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video...

Lindsay creates a rectangle that has the same area (but different side lengths) than a given rectangle.

Lindsay from Khan Academy finds the missing side length on a rectangle when given the area of the rectangle. [3:03]

Sal finds area of a rectangle with different sized units.

Sal creates and interprets bar and picture graphs. Includes a video, transcript, and question and answer section. [4:57]

Sal finds area of a rectangle with different sized units. [3:43]

Lindsay finds the area of a rectangle both by counting unit squares and multiplying side lengths.

Conceptualize what area is by calculating the area of a rectangle by using unit squares and the area formula. [3:21]