Area - unit squares and pattern blocks
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Intros
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Examples
Lessons
- Understanding area using pattern blocks
Find the area of the shape made by mixed pattern blocks.
Give the area in number of green pattern blocks, which look like:
- Create shapes using pattern blocks to show area
Make a shape using the specific pattern blocks and with the given area. - Understanding area using tangrams
For tangrams, the area unit is a small right-angle triangle.
What is the area of the given shape in number of triangles? - Area by counting unit squares
Count the number of unit squares to find the area. Give the answer in unit squares. - Area equations with multiplication
Fill in the blanks for the rectangle made of unit squares.- Write a multiplication equation for the area
- Give the area in unit squares
Topic Notes
In this lesson, we will learn:
- Area is the 2D measurement of the total space covered by a shape
- The area of a figure can be covered by pattern blocks
- The area of a figure made of unit squares is found by counting the total number of squares
- The formula shortcut for the area of a rectangular figure made of unit squares
Notes:
- Area is the measure of the amount of two-dimensional space covered by a shape
- Pattern blocks are coloured polygons used in classrooms to help understand area.
- There are four types of pattern blocks
- The smallest pattern block (green triangle) can fit into the other pattern blocks
Example: pattern blocks are used to cover the outline of a figure (covering the area)
- Area should be given as one type of unit only; all measurements are given in the same units
- i.e. I would say “my book is as long as 2 as my index fingers”. I would not say “my book is the length of 1 of my fingers, 3 of my toes, and half a crayon long”.
- In the previous example, it is better to give the area as 15 green blocks.
- Unit squares are building blocks of figures and measure 1 unit on all sides; the area of one centimeter unit square is 1cm2. (For perimeter, these are called grid squares)
- To find the area of a shape/figure, count the total number of squares
- If the unit squares are arranged in a rectangular figure, use the formula: Area = length × width
Example: Find the area of this figure
