Add Math - Heron's Formula

How to find the Area of an irregular triangle if no angle is given and you only have the length of it.

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[mathew_pang]

Just realised Heron's Formula is in SPM syllabus, so I quickly make a show video to teach students how to use it

[sarvena]

Thank you so much sir, I hope you can do a lot of shorts like this

[davidlee]

Sir, can try to teach derivation of Heron's formula