See leanne's answer to Shanice's Primary 5 Maths Area & Volume Singapore question

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Hope this helps!
Area of triangle Abc = area of triangle DEF since both are identical

Shanice

4 years ago

Thx Leanne!! Just wondering why CE over EF equals to CG over DF?

Leanne

4 years ago

That’s because it is directly proportionate, so we can use that as a ratio.
Comparing the smaller triangle CEG and triangle DEF. Hope this helps! :)

Shanice

4 years ago

Oic.... got it now !!! Tq so much !!

Leanne

4 years ago

Great! No problem :)