noun🔗Share半圆，半圆形。 Half of a circle."The pizza cutter made a perfect semicircle across the pie. "披萨刀在馅饼上切出了一个完美的半圆形。mathpartChat with AIVocabulary GamePractice Reading
noun🔗Share量角器, 半圆仪 An instrument for measuring angles."The student used the semicircle to carefully measure the angle of the triangle in her geometry assignment. "学生用量角器，小心地测量了她几何作业里三角形的角度。mathdeviceChat with AIVocabulary GamePractice Reading
