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secondary 4 | E Maths
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Fiona
Fiona

secondary 4 chevron_right E Maths

Part(a) only

Date Posted: 6 years ago
Views: 221
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Jiehui
Jiehui
6 years ago
Line DC =AD=8cm
Triangle ODC is an isosceles
Does that help?
Nur zawatil isqi Zakaria
Nur Zawatil Isqi Zakaria
6 years ago
It seems like 90° because D is the mid point for OA. 90° in rad is 1.57 rad.
Jiehui
Jiehui
6 years ago
I don't think it's 90 Deg. Though it may be the mid point, we don't know where the other point lies, so we can't safely assume the right angle. The answer I got. 1.94 rad
Nur zawatil isqi Zakaria
Nur Zawatil Isqi Zakaria
6 years ago
You are right. I have just realized that the arc AC part of circle with center D.

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Ahmad Irfan
Ahmad Irfan's answer
4 answers (A Helpful Person)
1st
DC also 8 cm ..
that make an isosceles triangle ..
Understand that isosceles have same legs and angles , so Change rad to degree(°) for you to easier find the angle Then you can find
Fiona
Fiona
6 years ago
Thank you!!