A 180 degree arc
A curved edge and a straight edge which makes two edges
semi circle
The semi-circle ruler is commonly known as a protractor. A protractor is a geometric tool used to measure and draw angles. It typically has a half-circle shape with degree markings along the curved edge.
The diameter.
If its 2d its called a semi-circle, if its 3d its called a semi-sphere.
a semi circle.. (:
If you have only one curved side, you could be a semi-circle or a crescent shape.
A semicircle is a two-dimensional (2D) shape. It is a closed curve that divides a circle into two equal parts, with one straight edge and one curved edge. In contrast, three-dimensional (3D) shapes have depth, width, and height, such as cubes, spheres, and pyramids.
Semi Circle
Every shape besides a circle, semi-circle, or anything curved.
A curved edge and a straight edge which makes two edges
Not usually. It is mostly made of plastic.