Damsieee's answer to Lau's Primary 6 Maths Geometry Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Damsieee
Damsieee's answer
22 answers (A Helpful Person)
1st
180 - 40 - 35 = 105
105 - 40 = 65° (angle a)