b. This angleis an obtuseangle
Again,you can comparethe angleto a right angle,if needed.
c. This angleis a right angle.
It is importantto note that usuallya right angleis markedwith a smallsquare.
It is also importantto note that you can determinethe measureof an angleusinga protractor. This measure
will of coursebe an approximation,as no protractoris perfectand the personmeasuringcannotperfectly
line up the protractoror hold it steady.
Example2:Use a protractorto measurethe anglein example1a.
Solution:The angleis about 50 o.