Changing last hint to answer + bolding last hint, take 1 (A -> C)
Merge branch 'master' of https://github.com/Khan/khan-exercises
estimating square roots
minor cleanup
oops.  Fixed less to more
Merge commit '7068d8b21e8d248e9fdd1a4847305a61f37f6414'
Add new exercise: circles and arcs. Tests how to calculate arc length and arc central angle stuff.
Add new exercise: shaded areas.
Add new exercise: areas of circles and sectors.
Add new exercise: area of parallelograms.
Add new exercise: areas of trapezoids, rhombi, and kites. Also teensy style change to area of parallelograms.
Merge pull request #25754 from xymostech/master

Fix Exercises not defined bug
Reverting changes due to adding modes (0ee8d0c4ec) that should not have been merged to stable.
Merge branch 'master' of http://github.com/Khan/khan-exercises
Add unscalePoint to fix kite area problem
Add new exercise: circles and arcs. Tests how to calculate arc length and arc central angle stuff.
Add new exercise: shaded areas.
Add new exercise: areas of circles and sectors.
Add new exercise: area of parallelograms.
Add new exercise: areas of trapezoids, rhombi, and kites. Also teensy style change to area of parallelograms.