Mathematics

12.1 The Square

(a) Properties of a square

Activity 12.1.1

I have learnt that:

Activity 12.1.2

Activity 12.1.3

     (b) Perimeter of a square

Activity 12.1.4

Activity 12.1.5

I have learnt that:

Example:

Activity 12.1.6

12.2 The Rectangle

(a) Properties of a rectangle

Activity 12.2.1

I have learnt that:

Activity 12.1.6

Activity 12.2.3

(b) Perimeter of a rectangle

Activity 12.2.4

Activity 12.2.5

Activity 12.2.6

Example:

Solution:

12.3 The Triangle

(a) Properties of a triangle

Activity 12.3.1

Activity 12.3.2

Activity 12.3.3

(b) Perimeter of a triangle

Activity 12.3.4

Activity 12.3.5

END UNIT ASSESSMENT 12

1. Name the following figures:

2. Answer by YES or NO

          (a) A square has 4 equal sides………………

         (b) The short sides of a rectangle are called length (L).….

         (c) A rectangle has 4 right angles………………….……..

         (d) A square has 4 acute angles………………………….

          (e) A rectangle has 3 sides, for which 2 are parallel and equal……………..

          (f) The long sides of a rectangle are called Width. …….….

          (g) A triangle has 4 sides and 3 angles……………………..

3. Find the perimeter of:

             (a) A square with the side of 12cm.

             (b) A rectangle with the length of 12cm and the width of 8cm.

             (c) A triangle which has: 7cm, 8cm and 9cm of sides.

4. Write 1 on a square, write 2 on a rectangle and write 3 on a triangle.

5. Find the perimeter of a flower gardens with the form of: 

            (a) A square of 80m of side. 

            (b) A rectangle with 54m of length and 40m of width. 

            (c) A triangle with 25m, 27m and 30m of sides.

6. Find the perimeter of the following figures: