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primary 5 | Maths | Area & Volume
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JJ
JJ

primary 5 chevron_right Maths chevron_right Area & Volume chevron_right Singapore

pls help

Date Posted: 5 days ago
Views: 10

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QNS 15.

Length for AF = 12 cm - 4 cm
= 8 cm
Area of triangle AFB = 1/2 X 8 X 6
= 24 cm^2
Length for DC = 9cm -6 cm
= 3 cm
Area of triangle BDC = 1/2 X 3 X 4
= 6 cm ^2
Total area of shaded region = 24 cm ^2 + 6 cm ^2 =30 cm ^2
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Keiko
Keiko's answer
70 answers (A Helpful Person)
1st
QNS 5.

Base of the triangle = 10 cm

Height of the triangle = 10 cm

Area of the triangle = 1/2 X 10 cm X 10 cm
= 50 cm^2
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Keiko
Keiko's answer
70 answers (A Helpful Person)
QNS 7

Area of the rectangle = 10 cm X 8 cm
= 80 cm ^ 2
Base of the triangle = 8 cm
Height of the the triangle = 3 cm

Area of the triangle = 1/2 X 8 cm X 3 cm
= 12 cm ^ 2

Total area = 80 cm ^2 + 12 cm ^ 2
= 92 cm^2
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Keiko
Keiko's answer
70 answers (A Helpful Person)