If Jordan has $55 and she earns $67 by doing chores, you can calculate how much money does Jordan have now using the following step:
$55 + $67 = $122
Result: Jordan has $122.
An obtuse angle would be an angle more then 90 degrees.
So if you add two angles together, it could be less then 90 degrees, such as 30 + 50 = 80 degrees.
However, it can also be more then 90 degrees, or an obtuse angle, for example 60 + 50 = 110 degrees.
So it's sometimes.
The formula is L = 2 pi r * (angle/360). We have what we need to figure it out. Do the work inside the () first. 72/360 = .2. So we have 2 pi (5) (.2). Do all that multiplication to get L = 2pi
