What shape is a rectangle with a semicircle on top?

A stadium is a two-dimensional geometric shape constructed of a rectangle with semicircles at a pair of opposite sides.

How do you find the perimeter of a window?

To find the perimeter of a rectangle, add the lengths of the rectangle’s four sides. If you have only the width and the height, then you can easily find all four sides (two sides are each equal to the height and the other two sides are equal to the width). Multiply both the height and width by two and add the results.

What is a half circle shape called?

A semicircle is half of a circle.

What shape is a semicircle?

A closed shape consisting of half a circle and a diameter of that circle*. A semicircle is a half circle, formed by cutting a whole circle along a diameter line, as shown above. Any diameter of a circle cuts it into two equal semicircles. * An alternative definition is that it is an open arc.

What is the area of semicircle?

Area of Semi Circle The area of a semicircle is half of the area of the circle. As the area of a circle is πr2. So, the area of a semicircle is 1/2(πr2 ), where r is the radius.

How do you find the area of semicircle?

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.

How do you find the perimeter of a rectangle with a semicircle?

The opposite sides of a rectangle are parallel and equal in length. Therefore, the two vertical sides are 45 centimetres. The perimeter is therefore equal to 45 plus 45 plus 35 plus 𝑥, where 𝑥 is the length of the arc of the semicircle. The circumference of any circle is equal to 𝜋 multiplied by the diameter or 𝜋𝑑.

What is the area and perimeter of semicircle?

The formula to calculate the area of a semicircle with radius ‘r’ is given as, Area of Semicircle = 1/2 × (πr2) square units. The formula to calculate the perimeter/circumference of a semicircle with radius ‘r’ and diameter ‘d’ is given as, The perimeter of Semicircle = πr + d units.

What is the formula of perimeter of semicircle?

Perimeter of Semicircle 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.