How to calculate the circumference of a semicircle
The circumference of a semi-circle = the circumference of a semi-circle: 65438+ 0/2 circumference of a circle+diameter = diameter ×π÷2+ diameter.
Formula: l = π d ÷ 2+d = 2π r ÷ 2+d = half = π r+d = π r+2r.
In mathematics (especially geometry), a semicircle is a one-dimensional trajectory of points forming a semicircle.
The radian of a semicircle is always 180 (equivalent to π radian or half a circle).
Two endpoints of any diameter of a circle divide the circle into two arcs, and each arc is called a semicircle.
The semicircle should be separated from the semicircle, because the semicircle is just an arc.
It is a half circle, and the center position of the half circle is the center position of its concentric circle. It has only one diameter, but it has countless radii and an axis of symmetry.
Interpretation of the concept of semicircle
In mathematics, a semicircle is a one-dimensional trajectory of points forming a semicircle. The radian of a semicircle is always 180 (equivalent to π radian or half a circle). It has only one line of symmetry (reflection symmetry). Two endpoints of any diameter of a circle divide the circle into two arcs, and each arc is called a semicircle. The semicircle should be separated from the semicircle, because the semicircle is just an arc. It is a half circle, and the center position of the half circle is the center position of its concentric circle. It has only one diameter, but it has countless radii and an axis of symmetry.
In non-technical applications, the word "semicircle" is sometimes used to represent a semicircle. The semicircle is a two-dimensional geometric shape, which also includes the diameter segment from one end of the arc to the other end, and all the inner points.
According to Thales theorem, any triangle inscribed at both ends of a semicircle and the third vertex of the semicircle at other positions are right triangles, and the third vertex has a right angle.
All the lines intersecting the semicircle are perpendicular to the center of the circle containing the given semicircle.