Answer this question… half
A protractor can be used to measure an angle. An angle is basically part of a circle. A complete circle is 360 degrees. A right-angle is 90 degrees, half a circle is 180 degrees, and so on.
180 degrees, if you mean a half circle
A semi-circle, half a circle, by definition is 180 degrees, half of a rotation. A whole circle has a whole rotation, which is 360 degrees.
An angle with a measure of 180 degrees will look like a straight line with the vertex being a point in the center. Since a complete circle is 360 degrees, opening an angle to 180 degrees traces out exactly half a circle.
John Stith Pemberton
If the arc is circular, such a figure is a semicircle or half circle.
Place the center point of the protractor at the vertex of the angle and one of the lines of the angle along the zero line of the protractor. The measure of the angle will then be where on the protractor's angular scale the other line of the angle lies.
The measure of the obtuse angle would then be double that of the acute angle.
A 180-degree arc is also called a half-circle.
It will be half the original angle.
It is the consequence of one of the circle theorems and in some books, it is considered a theorem itself. The underlying proposition is that the angle subtended at the circumference of the circle by any arc of a circle is half the angle subtended at the centre. In the case of a semicircle, the arc is the half circle and the angle at the centre is the one that the diameter makes at the centre of the circle ie 180 degrees. So the angle at the circumference is half that ie 90 degrees.
A straight angle is a half circle.
It does not measure anything. It is a two dimentional figure equivelent to half of a circle.
Half the diameter of a circle called the semicircle
You find the arc measure and then you divide it in half to find the inscribed angle
Half the distance across a circle.
It is an angle that divides a right angle in half. It measures an eighth of a circle or pi/4 radians.