In the diagram below,
DCA is referred to as an exterior angle of ∆ABC because it lies outside the triangle and is formed by extending a side of the triangle. Homework Help ✎
CAB = 46° and m ABC = 37°, what is m DCA ? Show all work.
DCA = 135° and m ABC = 43°, then what is m CAB?
How do the angles of a triangle relate to each other? How will this help you solve for ∠DCA?
46° + 37° + ∠ACB = 180° Then how are ∠ACB and ∠ACD related?
Use similar methods to those used for part (a). The methods might be used in a different order.