Visualizing the Area of a Parallelogram Formula by decomposing the parallelogram and recomposing to build a rectangle with the same area.

# Category - Measurement

Build an understanding of the area relationship between triangles and rectangles through this set of Area of a Triangle Number Talk Prompts.

Visual number talk prompts to build on the conceptual understanding of area of a circle to emerge the formula for volume of a cylinder.

Visual number talk prompts emerging the idea of revealing equivalent ratios by scaling in tandem with ratio reasoning.

Visual number talk prompts unpacking where the area of a circle formula comes from by decomposing the circle and recomposing into a rectangle

Visual number talk prompts exploring the ratio between the circumference and the diameter known as Pi, π with ratio & rate reasoning.

Visual number talk prompts that explore the area of a composite figure by decomposing and recomposing with non-standard units.

Visual number talk prompts comparing the volume of 3-D figures multiplicatively using various standard and non-standard cubic units.

Let's tackle Area of a Circle conceptually using a series of visual prompts to help students generate the formula for finding the area of ANY circle...

Let's tackle Area of a Triangle conceptually using a series of visual prompts to help students generate the formula for finding the area of ANY...