Length of an Arc and Area of a Sector
Move the black slider to change the radius and the green slider to change the angle. Work out the area of the sector and the length of the arc. Click the show/hide buttons to reveal formulas, calculations and answers as you need them.
Special Triangle Points
Theorem 10.5 Congruent Chords
Angle at Centre and Circumference (Teacher)
Centroid or Barycenter
Stochastic Process or Random Process