Arnold K H Tan's answer to Felicia's Secondary 4 E Maths question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Arnold K H Tan
Arnold K H Tan's answer
2165 answers (A Helpful Person)
1st
You used the wrong angle for the area of the triangle. 5 sig fig is more than enough, before the final answer.