semicircular

"Her mother's illness changed the shape of their family life. "

"My teacher said I could retake the test if I studied hard. "

"My daughter's teacher is very kind and helpful. "

"The students sat at their desks, ready for the lesson to begin. "

"I ate the slightly smaller half of the apple."

"It looks weaker and weaker, the more I think about it."

"Everyone in the class needs to bring their textbook to the first lecture. "

"The pizza cutter made a perfect semicircle across the pie. "

"The set of all points (x, y) such that (x − 1)2 + y2 = r2 is a circle of radius r around the point (1, 0)."

"She arranged the books on the shelf by color. "

"The presentation about the new school rules was very clear and easy to understand. "

"The intricate formation of the puzzle pieces allowed the child to assemble a picture of a dog. "