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P5 MATHS

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SAPMATP5_W15Page 1/4

Taken from Learning Maths Book 5A

Area of Triangles

Name the three sides of each triangle. Identify its base and height.

1. Thethreesidesofthetriangleare

, and .

Base= = cm

Height= = cm

2. Thethreesidesofthetriangleare

, and .

Base= = cm

Height= = cm

3. Thethreesidesofthetriangleare

, and .

Base= = cm

Height= = cm

A

B C15cm

14cm

E

F

D

6cm

12cm

X

Y

Z

4cm

9cm

1. AB; BC; CA BC; 15 or AB; 14 AB; 14 or BC; 15

2. DE; EF; FD DE; 6 or EF; 12 EF; 12 or DE; 6

3. XY; YZ; ZX YZ; 4 or XY; 9 XY; 9 or YZ; 4

Solutions:

P5 MATHS

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SAPMATP5_W15Page 2/4

Taken from Learning Maths Book 5A

Area of Triangles

For each figure, find the area of the shaded triangle.

1.

2.

3.

16cm

9cm

3cm

10cm

19cm

8cm

1. 72 cm2

Area = 1 _ 2 × base × height

= 1 _ 2 × 9 × 16

= 72 cm2

2. 15 cm2

Area = 1 _ 2 × base × height

= 1 _ 2 × 3 × 10

= 15 cm2

3. 76 cm2

Area = 1 _ 2 × base × height

= 1 _ 2 × 19 × 8

= 76 cm2

Solutions:

P5 MATHS

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SAPMATP5_W15Page 3/4

Taken from Learning Maths Book 5A

Area of Triangles

For each figure, find the area of the shaded triangle.

1.

2.

3.

15cm

8cm

8cm

30cm

18cm

23cm

1. 207 cm2

Area = 1 _ 2 × base × height

= 1 _ 2 × 23 × 18

= 207 cm2

2. 60 cm2

Area = 1 _ 2 × base × height

= 1 _ 2 × 15 × 8

= 60 cm2

3. 120 cm2

Area = 1 _ 2 × base × height

= 1 _ 2 × 30 × 8

= 120 cm2

Solutions:

P5 MATHS

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SAPMATP5_W15Page 4/4

Taken from Mental Mathematics Book 5

STRATEGY

Solutions: 1. 7 2. 3 3. 1 4. 7 5. 1 6. 2 7. 4 8. 6 9. 1 10. 6

Findtheremainderwhen4169÷8.

169÷8=21R1[dividethelast3digitsofthenumberby8togettheremainder]

Theremainderwhen4169÷8is1.

Mental Maths:ADivision – Remainder When Divided by 8

Do these sums mentally.Find the remainder when

1. 9415÷8

2. 3235÷8

3. 1097÷8

4. 4455÷8

5. 6361÷8

6. 8706÷8

7. 2948÷8

8. 5742÷8

9. 7545÷8

10. 3678÷8

R=

R=

R=

R=

R=

R=

R=

R=

R=

R=