Understanding angles

The first instance of  is under the 4th Grade Math Mission. This exercise helps to understand measurements of angles including reflex angles.

Types of Problems
There are four types of problems in this exercise:


 * 1) Degrees in fraction of a circle: This problem has a circle cut into a number of sectors. The student answers the fraction of the circle that one sector represents and the measure of it's central angle.UA1.png
 * 2) Angle description: This problem has describes a situation and asks the student to select the multiple choice selection that is similar to the described situation.UA2.png
 * 3) Put in order: This problem has drawings of several angles and the students is asked to put them in order.UA3.png
 * 4) Word problem: This problem describes a word problem, sometimes with and sometimes without a picture, and the student is supposed to solve the problem and type the answer in the box.UA4.png

Strategies
This exercise is difficult to get accuracy badges because some of the questions can be very subtle. Once every 25 problems or so is a problem that makes sense when you think about it but is very easy to misinterpret. Speed badges should also be considered hard at this time.


 * 1) In the first problem type the answer for the number of degrees will be an integer, so this restricts the possibilities.
 * 2) Put in order always seems to be smallest angle to largest angle.

.