Year 7
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.
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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