Merge pull request #103000 from petercollingridge/sector

Add radians to exercise type 1
Fix hints
Make fractions a bit simpler
Add radians to circles and arc exercise
Reword hints to be consistent

Auditors: eater
Merge pull request #106664 from petercollingridge/funcinv

Add exercise that require use of expression editor

Auditors: eater
Merge pull request #106715 from petercollingridge/shift_reflect

Make one function dotted so we don't rely just on colour
Improve hints

Auditors: eater
Merge pull request #107979 from petercollingridge/eqifrac

Rewrite hints

Auditors: eater
Merge pull request #108081 from petercollingridge/multimixed

Simplify hints

Auditors: eater
Merge pull request #110216 from petercollingridge/constructions3

Fix inCenter equation
Function to find inradius
Start incircle exercise
update validator
Improve findInscribedPolygon function tests
Put constructions utils back
Finish inscribed circle exericse
Revert to updated constructions util
Circumscribing circle exercise
Function to find inradius and circumradius
Check tool properties properly

Auditors: eater
Merge pull request #113389 from petercollingridge/impfrac

Rewrite hints
Improve hints
Remove unnecessary style

Auditors: eater
Merge pull request #114494 from petercollingridge/system_eq

Tidy hints
Specify larger and smaller number
Replace br with p
Make more numbers mathy

Auditors: eater
Merge pull request #114560 from petercollingridge/compsquare

Create a completing the square exercise
Fix final hint

Auditors: eater
Merge pull request #120614 from petercollingridge/addfrac

Rewrite hints

Auditors: eater
Merge pull request #120718 from petercollingridge/fractions

Rewrite fractions for add and subtract fractions
Add Common Core approcapproved denominators
Change denominators used
Rewrite more hints
Remove simplification steps
Add graphie
Add graphical hints

Auditors: eater