Just the one and it is its radius when at right angles to the semi-circle's centre
No.
The angles of a semi-circle are on a straight line and angles on a straight line add up to 180 degrees.
If the two edges of the arc is connected like a D, yes, it has 2 right angles
triangle form in a semi circle is right triangle
Just the one and it is its radius when at right angles to the semi-circle's centre
No.
A semi circle is made up of two right angles.
The angles of a semi-circle are on a straight line and angles on a straight line add up to 180 degrees.
If the two edges of the arc is connected like a D, yes, it has 2 right angles
It has no angles because circles are not common shapes. Well they're common but they don't have ANY sides, angles, OR CORNERS!
1 i think
In geometry, angles are created by the intersection of lines or of line segments. A curve is not an angle, and a semi-circle (or complete circle) consists only of one continuous curve. There are no angles as such. If you like, you can conceive of a curve as a collection of infinitely many angles. But you can never see them individually, they are only seen as a group. They are not obtuse (or acute) angles in the normal sense of the term.
The angles in a semi-circle add up to 180
triangle form in a semi circle is right triangle
A right angle triangle can fit into a semi-circle
Semi means half. So there are two semicircles in a circle.