Question
A rectangular piece of paper is folded along the dotted line as shown. Find
  1. ∠a
  2. ∠r.
3 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

A rectangular piece of paper is folded along the dotted line as shown. Find
  1. ∠a
  2. ∠r.