Christmas MT's answer to Alice's Primary 6 Maths Measurement Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Christmas MT
Christmas Mt's answer
3275 answers (A Helpful Person)
1st
Sorry for the handwriting.

Use similar triangles and Pythagoras' Theorem to derive the length of a side of ABCD.