Question

Решите даю 35 баллов

Answer 1

Объяснение:

1)R^2=OB^2=OC^2+BC^2=12^2+16^2=400

R=√400=20

2)S=пR^2=п×20^2=400п

Answer 2

1)R^2=OB^2=OC^2+BC^2=12^2+16^2=400

R=√400=20

2)S=пR^2=п×20^2=400п