Practice problem
If, in the above figure, 1=60∘1 = 60^{\circ}1=60∘ and 2=30∘2 = 30^{\circ}2=30∘, 4=?4 = ?4=?
90∘90^{\circ}90∘
120∘120^{\circ}120∘
150∘150^{\circ}150∘
Not enough information is given.
Type a concept, like “slope” or “photosynthesis”.
