Year 6

Year 6

# Decimals and measures: Calculating the area of parallelograms and triangles

## Lesson details

### Key learning points

1. In this lesson, we will use and investigate formulae to calculate the area of a triangle and parallelogram.

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

## Video

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## Worksheet

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## Starter quiz

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### 6 Questions

Q1.
0.56 x 10
0.056
0.560
Q2.
1.405 x 100
0.01405
1.40500
Q3.
4.56 ÷ 100
0.456
456
Q4.
654.8 ÷ 10
6.548
6548
Q5.
What is the area of the shape below?
10 cm²
20 cm²
Correct answer: 21 cm²
Q6.
What is the perimeter of the shape below?
10 cm
Correct answer: 20 cm
21 cm

## Exit quiz

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### 3 Questions

Q1.
Calculate the area of the parallelogram.
18 cm²
Correct answer: 36 cm²
39.6 cm²
Q2.
Calculate the area of the triangle.
12 cm²
14 cm²
16 cm²
Correct answer: 7 cm²
8 cm²
Q3.
A shape is made up of 12 congruent equilateral triangles, with base 3.4 cm and height 2.9 cm. What is the total area of the shape?
118.32 cm²
29.58 cm²
Correct answer: 59.16 cm²