Measuring Perimeter
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Measuring the Perimeter of Shapes: Rectangles and Squares, Lecture notes of Elementary Mathematics
Instructions and examples for calculating the perimeter of rectangles and squares using centimeters. Students are encouraged to work with a partner and use a ruler to measure the sides of various shapes. several practice problems for calculating the perimeter of given rectangles and squares.
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2021/2022
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Measuring Perimeter
Success Criteria
Aim
- I can calculate the perimeter of a shape in centimetres.
- I can measure the length of sides of rectangles and squares.
- I can add the measurements of sides together to calculate perimeter.
Perimeter is the total distance around the edge of a figure or shape. Calculating Perimeter What is the perimeter of the rectangle? 10cm + 5cm + 10cm + 5cm = 30cm Here are the measurements of a rectangle:
Calculate the perimeter of these shapes: Calculating Perimeter 9cm 6cm (^) 4cm A 4cm 3cm 5cm 3cm 5cm
B
4cm 8cm 3cm C 3cm
Calculate the perimeter of these shapes: Calculating Perimeter perimeter = perimeter = perimeter = perimeter = 1cm 1cm
Calculate the perimeter of these shapes: Calculating Perimeter perimeter = 12cm perimeter = 10cm perimeter = 18cm perimeter = 12cm 1cm 1cm
Calculate the perimeter of these rectangles: Calculating Perimeter 4cm 4cm 5cm 5cm 3cm 3cm 8cm 8cm 8cm 8cm 4cm 4cm 1cm 1cm 9cm 9cm A = 22cm B = 18cm C = 24cm D = 20cm
4cm This shape is a square. We know that one of its sides is 4cm. Squares and Rectangles 4cm 4cm 4cm All sides are of a square are equal. The perimeter of this square is 4cm + 4cm + 4cm + 4cm = 16cm (or 4cm × 4 = 16cm)
3cm 6cm 2cm Calculate the perimeter of these squares: Squares and Rectangles A = 12cm B = 24cm C = 8cm
4cm 8cm This shape is a rectangle. We know that one of its sides is 4cm and the other is 8cm. Squares and Rectangles 4cm 8cm In a rectangle, opposite sides are equal. The perimeter of this rectangle is 8cm + 8cm + 4cm + 4cm = 24cm
Use your measuring mastery to complete these activity sheets: Measuring Perimeter
Dive in by completing your own activity! Diving into Mastery
Answer: The odd one out is…. 5cm 2cm 4 ½ cm 2 ½ cm 6cm 1cm 4cm 4cm 3cm All these shapes have the same perimeter, except for one. Find the odd one out: Spot the Odd One Out All the other shapes have a perimeter of 14cm. This one has a perimeter of 16cm.
Success Criteria
Aim
- I can calculate the perimeter of a shape in centimetres.
- I can measure the length of sides of rectangles and squares.
- I can add the measurements of sides together to calculate perimeter.