None because it has 1 straight side and no angles
None
1
180º degrees.
One. The line of symmetry for a 180 degree arc (a semicircle) is the line that bisects the arc.
A semicircle has 180 degrees
180x2= 360 degrees
an ovalish shape, like this () Or perhaps a semicircle.
Semicircle has four syllables.
If, by square corners, you mean corners that are right angles, then any polygon with four or more sides can have two square corners. Furthermore, apart from near the corners, the lines need even be straight so the shape need not be a polygon. In the limit a semicircle has two right angles.
1
180º degrees.
2
there are two angles
One. The line of symmetry for a 180 degree arc (a semicircle) is the line that bisects the arc.
No, a semicircle is not a quadrilateral
Semicircle
The possessive form is semicircle's.
Calculating the radius of a semicircle depends on what information about the semicircle is given.