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6 cm

6.3 cm
3 cm 3 cm

1 cm 1 cm
Measure the length of the
Perimeter = 1 + 3 + 6 + 3 + 1 + 6.3 curve by using a thread.
= 20.3 cm

Self Practice 10.1a

1. Determine the perimeter of each of the following shapes.
(a) 6 cm (b) (c)
11 cm 10 cm

5 cm
20 cm
6 cm 14 cm
How do you estimate the perimeter accurately? LEARNING
STANDARDS
We can use a square grid paper or a graph paper to estimate Estimate the perimeter of
the perimeter of a shape. various shapes, and then
evaluate the accuracy of CHAPTER
1 Pair estimation by comparing
with the measured value.
10
Aim: To estimate the perimeter of various shapes.
Instruction: Perform the activity in pairs.

1. Trace the shape of the object on a grid of
Guru: Membina Ilmu
equal squares with sides of 1 cm. Guru: Membina Ilmu
Menyempurnakan Akhlak
Menyempurnakan Akhlak
2. Estimate the perimeter of each shape
based on the grid.
3. Measure the perimeter of each shape
using a ruler or a thread.
4. Record your estimation and measurement.
5. Compare the estimated value with the
measured value to evaluate the accuracy
of your estimation.

227
Perimeter and Area

10 TB Math F1.indd 227 11/10/16 12:19 PM