How do you break down 213 in times

The triangles in the diagram are congruent. if mzf = 40°, mza = 80°, and mzg = 60°, what is mzb?

Due to bad planning, two of the local schools have their annual plays on the same weekend. while 457 people attend one, and 372 attend the other, only 104 people were able to attend both. how many people went to at least one play?

The dash figure is a dilation if the original figure. find the scale factor. classify the dilation as an enlargement or a reduction