Reasoning to Find Area

Aim: Finding Area by Tiling with Unit Squares.

  • Move the squares to fill a figure. ​
  • Find its area by the number of enclosed squares.
  • Click on to return the tiles.

Aim: Investigating the area of a rectangle.

Move the sliders and observe the effect on the dimensions of the figure in relation to its area.

Aim: Finding Area of Irregular Shapes.

Find the area of the shaded portion of the figures. If you wish, you can use the triangles in the second app below to help illustrate and support your explanations for the area of figure D.

Find the area of the figure below.

Find the area of the figure below.

Find the area of each shaded region. Show your reasoning.