P5 MATHS © Singapore Asia Publishers Pte Ltd Website: www.sapgrp.com | Facebook: Singapore-Asia-Publishers SAPMATP5_W15 Page 1/4 Taken from Learning Maths Book 5A Area of Triangles Name the three sides of each triangle. Identify its base and height. 1. The three sides of the triangle are , and . Base = = cm Height = = cm 2. The three sides of the triangle are , and . Base = = cm Height = = cm 3. The three sides of the triangle are , and . Base = = cm Height = = cm A B C 15 cm 14 cm E F D 6 cm 12 cm X Y Z 4 cm 9 cm 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:
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P5 MATHS
© Singapore Asia Publishers Pte LtdWebsite: www.sapgrp.com | Facebook: Singapore-Asia-Publishers
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
© Singapore Asia Publishers Pte LtdWebsite: www.sapgrp.com | Facebook: Singapore-Asia-Publishers
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
© Singapore Asia Publishers Pte LtdWebsite: www.sapgrp.com | Facebook: Singapore-Asia-Publishers
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
© Singapore Asia Publishers Pte LtdWebsite: www.sapgrp.com | Facebook: Singapore-Asia-Publishers
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=
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