Let Δ be the area of the circumcircle of a right angled triangle ABC with ∠B = 90°. Let Δ1 and Δ2 be areas of the two circles with diameters BC and BA respectively. Then
1
\(\Delta^2=\Delta_1^2+\Delta_2^2\)
2
Δ = Δ1Δ2
3
Δ = Δ1 + Δ2
4
\(\frac{\Delta_1}{\Delta_2}=\Delta\)