How many straight lines does a semi circle have?

1 straight line
SEMI CIRCLE It is made up 1 curved line and 1 straight line. It has 2 corners.

How do you find the area of a semicircle with the diameter?

The area of a semicircle can be calculated using the length of radius or diameter of the semicircle. The formula to calculate the area of the semicircle is given as, Area = πr2/2 = πd2/8, where ‘r’ is the radius, and ‘d’ is the diameter.

What part of the circle has length which is one half of the diameter?

Radius
Radius: a line segment joining the centre of a circle with any single point on the circle itself; or the length of such a segment, which is half (the length of) a diameter.

What is half a circle?

A semicircle is half of a circle.

How do you find the diameter?

The formula to find the diameter states the relationship between the diameter and the radius. The diameter is made up of two segments that are each a radius. Therefore, the formula is: Diameter = 2 * the measurement of the radius. You can abbreviate this formula as d=2r.

What is the equation of a half circle?

In general, when the equation (x – h)2 + ( y – k)2 = r 2 is solved for y, the result is a pair of equations in the form y = ±√r 2 – (x – h)2 + k. The equation with the positive square root describes the upper semicircle, and the equation with the negative square root describes the lower semicircle.

What is the length of semicircle?

The perimeter of a semicircle is the sum of the half of the circumference of the circle and diameter. As the perimeter of a circle is 2πr or πd. So, the perimeter of a semicircle is 1/2 (πd) + d or πr + 2r, where r is the radius.

Is a semicircle a half circle?

A semicircle is a half circle. That means a semicircle will have half of the area of a circle. You might think that means it will have half the perimeter of a circle, but that is not true.

How do you find the diameter and perimeter of a semicircle?

The diameter, like in a normal circle, is just twice the radius. The perimeter of a semicircle will be one half the circumference of its original circle, πd, plus its diameter d. Note: by no means should you commit to memorizing the area or perimeter formulas I’ve derived here.

What is the value of π for a semicircle?

The value of π is 3.14 or 22/7. The perimeter of a semicircle is the sum of the half of the circumference of the circle and diameter. As the perimeter of a circle is 2πr or πd. So, the perimeter of a semicircle is 1/2 (πd) + d or πr + 2r, where r is the radius.

What divides a circle into two equal halves?

The diameter divides the circle into two halves such that they are equal in area. These two halves are referred to as the semicircles. The area of a semicircle is half of the area of a circle. A circle is a locus of points equidistant from a given point which is the centre of the circle.