CPM Homework Help : GC Problem 1-55

Estimate the size of each angle below to the nearest $10°$ . A right angle is shown at right for reference so you do not need a protractor.

Your teacher will provide you with a model.

Hint:

Look at problem 1-42. How do the angles relate to the right angle?

Answer (a):

$120°$

Answer (b):

$40°$

Answer (c):

$230°$