Answer:
20 degrees.
Step-by-step explanation:
We can assign variables for this problem. We can see that the overall angle adds up to 100 degrees, with Angle 1 being four times Angle 2, where Angle 2 being a random variable we can call x.
Using this information, we can conclude that Angle 1 is 4x and Angle 2 is x.
We can add those variables together, equal it to 100 degrees since ABD is known to be 100 degrees, to find variable x, and input it to find angle 2.
4x+x=100 (make equation)
5x=100 (add like terms)
x=20 (isolate x)
We know that x stands for 20, and since angle 2 is just x, the answer is just 20 degrees.
