A.180°-半圓周度數(shù) B.半圓周度數(shù) C.180°+半圓周度數(shù) D.360°-半圓周度數(shù)
A.180°半圓周度數(shù) B.半圓周度數(shù) C.180°+半圓周度數(shù) D.360°-半圓周度數(shù)
A.10° B.10°.25 C.11° D.11°.25