Checking understanding of perimeter | Maths | Quizalize & Oak National Academy

Starter quiz

Which of these units are a measure of length?
- cl
- kg
- km ✓
- m $^2$
- mm ✓
The image shows a wall whose length has been measured in four parts. The total length of the wall is ______ m.
- '420' ✓
Which length is equal to $a$ ?
- $b$
- $c$
- $d$
- $e$
- $f$ ✓
A ______ shape is a shape created using two or more basic shapes.
- compound ✓
- regular
- solid
Solve the equation: $20 = 12 + a$
- '8' ✓
Solve the equation: $2a + 8 = 18$
- '5' ✓

The ______ is the distance around a 2D shape.
- 'perimeter' ✓
Which of the units could be used to measure perimeter?
- cm ✓
- cm $^2$
- cm $^3$
What is the perimeter of the rectangle?
- 7 m
- 10 m
- 12 m
- 14 m ✓
When $a = 5$ the perimeter of the octagon is ______ mm.
- '40' ✓
The perimeter of the hexagon is 24 cm. Find the value of $a$ .
- '4' ✓
The perimeter of the compound rectilinear shape is ______ cm.
- '180' ✓

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Summing all of the given lengths and only the given lengths to find the perimeter.

With each example discuss which lengths are part of the perimeter, which lengths are not and whether any lengths are equal to others.