Kwagh u eren tom a mi u ôron akaa a a lu gbilin sha u eren arch yô
R1 - Radius u ken atô u arch la.
R2 - Radius u ken won u arch la.
S - Iyenge i akaa a arch.
U - Angle u sektor u ikyav.
Program u eren akaa.
I ôr iyenge i akaa a i gbe u a er ikyagh ki esen iyou la man iyenge i akaa a i gbe u a er sha mi la.