# Perimeter expressions

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## Lesson details

### Key learning points

- In this lesson, we will learn how to form expressions using algebraic lengths and draw shapes given expressions for the perimeter.

### 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.

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### 5 Questions

Q1.

Fill in the gap. We can use an established inequality to form a related ____.

equation

expression

sum

Q2.

If 19 > 14, which symbol would go in the gap: 7 × 19 __ 7 × 14?

+

<

=

Q3.

If 19>14, which symbol would go in the gap: (−3) × 19 __ (−3) × 14?

+

=

>

Q4.

Which of the following inequalities are true when n = 3 and m = -2?

-2n > -2m

n + 3 < m + 3

n < m

Q5.

Which of the following inequalities are always true when a > b?

-3a > -3b

a - 4 > b

a > 7b

### 5 Questions

Q1.

Perimeter is the total _____ of all sides of a shape. When the side lengths are written algebraically the perimeter can be written as an _______.

length, equation

weight, equation

weight, expression

Q2.

Which of the following is an expression for the perimeter of this shape? (Use the definitions from the lesson.)

4p + 2q

6p

6q

Q3.

Which of the following is an expression for the perimeter of this shape? (Use the definitions from the lesson.)

2p + 4q

6p

6q

Q4.

Which of the following is an expression for the perimeter of this image? (Use the definitions from the lesson.)

12p + 2q

16pq

6p + 10q

Q5.

Which of the following is an expression for the perimeter of this image? (Use the definitions from the lesson.)

12p + 2q

16pq

6p + 10q