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- NZ Year 4 Maths
- Perimeter and Area

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Try reviewing these fundamentals first

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Get Started NowStart now and get better maths marks!

Get Started NowStart now and get better maths marks!

Get Started NowStart now and get better maths marks!

Get Started Now- Intro Lesson: a1:24
- Intro Lesson: b8:17
- Intro Lesson: c5:22
- Lesson: 1a2:00
- Lesson: 1b3:05
- Lesson: 1c2:59
- Lesson: 2a3:07
- Lesson: 2b6:23
- Lesson: 3a1:12
- Lesson: 3b1:03
- Lesson: 3c1:29
- Lesson: 4a0:41
- Lesson: 4b0:51
- Lesson: 4c1:03
- Lesson: 5a4:43
- Lesson: 5b5:07
- Lesson: 5c4:57

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

**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 1cm^{2}. (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

- IntroductionIntroduction to Area - Unit Squares and Pattern Blocks:a)What is area?b)How to cover the area of a figure using pattern blocks (and tangrams)c)How to find the area of figures using unit squares
- 1.
**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:a)b)c) - 2.
**Create shapes using pattern blocks to show area**

Make a shape using the specific pattern blocks and with the given area.a)Use green and yellow pattern blocks only to make a shape with an area of 11 green pattern blocks.b)Use red and blue pattern blocks only to make a shape with an area of 14 green pattern blocks. - 3.
**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?a)b)c) - 4.
**Area by counting unit squares**

Count the number of unit squares to find the area. Give the answer in unit squares.a)b)c) - 5.
**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

a)b)c)