The girls are surprised when Neiru invites them all to her house, and even more surprised to find out that she lives at her company. Is Neiru ready to be open about her situation, and how will the others take it if she is?
Find the radius of a circle that
intersects points A, B, C, and D.
أوحد نصف قطر الدائرة المتقاطعة مع النقاط 
.A B C D
Bestimme den Radius des Kreises,
der die Punkte A, B, C und D berührt.
Encontrad el radio de un círculo
que interseca los puntos A, B, C y D.
Déterminez le rayon du cercle
qui passe par les points A, B, C et D.
Trovate il raggio della circonferenza 
che interseca i punti A, B, C e D.
Encontre o raio do círculo que
cruza os pontos A, B, C e D.
Вычисли радиус круга, который 
проходит через точки A, B, C и D.