Starter quiz
- The ______ is the distance around a 2D shape.
- 'perimeter' ✓
- Which units can be used for perimeter?
- cm ✓
- cm²
- cm³
- grams
- litres
-
- 1 cup is equivalent to 16 tablespoons. A quarter of a cup is equivalent to ______ tablespoons.
- '4' ✓
- Approximately 28 grams are equivalent to 1 ounce (oz). There are 16 ounces in a pound. 1 pound is approximately __________ grams.
- 1.75
- 12
- 44
- 448 ✓
-
- 1 kilometre = ______ centimetres.
- '100 000' ✓
- Starting with the smallest length, put the lengths in order of size.
- 1⇔35 000 mm
- 2⇔0.35 km
- 3⇔350 000 cm
- 4⇔35 000 m
Exit quiz
The perimeter of the rectangle is ______ cm.- '50' ✓
The perimeter of the parallelogram is __________ units.- 7
- 8
- 12
- 14
- 16 ✓
-
The perimeter of the trapezium is 26 units. The length of the sloping side is ______ units.- '8' ✓
The regular hexagon has perimeter 30 cm. =______.- '5' ✓
- Jacob draws a rectangle. Sofia draw a parallelogram (without right angles). Each shape has the same base and height. Which statement is true?
- The rectangle has a greater perimeter than the parallelogram.
- The parallelogram has a greater perimeter than the rectangle. ✓
- Both shapes have the same perimeter.
-
The perimeter of the rectangle is 28 cm. = ______.- '6' ✓
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- The perimeter of any polygon can be found by adding but this may be time consuming.
- By considering the properties of the shape, there may be a more efficient method.
- There is a formula to find the perimeter of rectangle.
- Missing side lengths can be found if the perimeter is known.
Common misconception
"To find the perimeter, you just add together the numbers that you see."
The perimeter of a polygon is the sum of the lengths of all the sides of that shape. Not all sides have their lengths explicitly written. This could be due to sides having equal length, and the lengths of some sides shown with hash marks.
Keywords
Perimeter - The perimeter is the distance around a 2D shape.
Polygon - A polygon is a flat (2D), closed figure made up of straight line segments.
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