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Secondary 1 | Maths
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Darren
Darren

Secondary 1 chevron_right Maths chevron_right Singapore

How to do.

Date Posted: 2 months ago
Views: 29

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AC Lim
Ac Lim's answer
2303 answers (A Helpful Person)
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Hope this help
Darren
Darren
2 months ago
How u get 5?
AC Lim
AC Lim
2 months ago
If you observe triangle ABD = Triangle BCD
and are equilateral triangle, Each have 60 deg. Therefore, height of BCD meet at center of DC. DC/2=5cm.

Another way to get height = 10 cos 30
or
10 Sin 60 (Since each angle are 60)