Identities and Formulas

Question 0

circle centered at (h,k)

Answer 0

r^2 = (x - h)^2 + (y - k)^2

r^2 = Σ[1,n] (p(i)-q(i))^2 :
p(j),q(j) ε P,Q &&
P,Q ε ( X(1) x … x X(n) )

Question 1

distance formula

Answer 1

sqrt( (p2 - q2)^2 + (p1 - q1)^2 )

sqrt( Σ[1,n] ( p(i)-q(i) )^2 ) :
p(j),q(j) ε P,Q &&
P,Q ε ( X(1) x … x X(n) )

Question 2

subtended arc length of circle

Answer 2

rθ (in radians)