John Oon's answer to tiffany's Secondary 3 E Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
John Oon
John Oon's answer
255 answers (Tutor Details)
1st
See Photo. Use :
"Tangent perpendicular to radius" and
"Phythagoras' Theorem".