A curved edge and a straight edge which makes two edges
No, on two counts.It is not 3-dimensionalIt does not have all straight edges.
Semi means half. So there are two semicircles in a circle.
If the two edges of the arc is connected like a D, yes, it has 2 right angles
A curved edge and a straight edge which makes two edges
A curved edge and a straight edge which makes two edges
4 faces and 2 vertices.
a circle has 0 edges.
No, on two counts.It is not 3-dimensionalIt does not have all straight edges.
Semi means half. So there are two semicircles in a circle.
A semi-circle is a two dimensional shape.
A semi-circle is a 180 degree half circle. A semi-circle does not have any corners. A circle does not have corners either. There are points of beginning and end in a semi-circle. In a circle the point of beginning is the same as the ending point.
a semi-circle only has one line of symmetry
a semi-circle only has one line of symmetry
a semi - circle has zero parallel lines
If the two edges of the arc is connected like a D, yes, it has 2 right angles
Never heard of it. Do you mean HEMIsphere? That's got one edge, which is a circle. Cut an orange in half across the middle and you'll have two hemispheres, close enough.