58.(Pg. [44]) What use can we make of compasses in measuring an angle?
59.(Pg. [44]) Into what number of parts do we suppose a whole circle divided, and what are these parts called?
60.(Pg. [44]) When are two angles said to be equal?
61.(Pg. [44]) Upon what does the dimension of an angle depend?
62.(Pg. [44]) What number of degrees, and what portion of a circle is there in a right angle?
63.(Pg. [44]) How must one line be situated on another to form two right angles? ([fig. 1.])
64.(Pg. [44]) [Figure 2] represents an angle of more than 90 degrees, what is that called?
65.(Pg. [44]) What are those of less than 90 degrees called as in [fig. 3]?
66.(Pg. [45]) If you make an elastic ball strike a body at right angles, how will it return?
67.(Pg. [45]) How if it strikes obliquely?