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P5 MATHS

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SAPMATP5_W15/4

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


, and .

Base= = cm

Height= = cm


, 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


SAPMATP5_W15/4


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


= 1 _ 2 × 3 × 10

= 15 cm2

3. 76 cm2


= 1 _ 2 × 19 × 8

= 76 cm2

Solutions:

P5 MATHS


SAPMATP5_W15/4


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


= 1 _ 2 × 23 × 18

= 207 cm2

2. 60 cm2


= 1 _ 2 × 15 × 8

= 60 cm2

3. 120 cm2


= 1 _ 2 × 30 × 8

= 120 cm2

Solutions:

P5 MATHS


SAPMATP5_W15/4

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=

area of triangles - sap educationp5 maths © singapore asia publishers pte ltd. website: | facebook:...

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