Area of a Circle: Subtraction or addition to a larger shape

A trapezoid is shown in the figure below.

On its upper base there is a semicircle.

What is the area of the entire shape?

$24+\text{3}.125\pi$ cm².

Two circles share a center point, marked O.

What is the area of the shaded part of the orange circle?

$12\pi$ cm²

Look at the circle in the figure.

Its center is O.

Inside the circle there is a square.

What is the area of the white parts combined?

23.085 cm²

From the point O on the circle we take the radius to the point D on the circle. Given the lengths of the sides in cm:

DC=8 AE=3 OK=3 EK=6

EK is perpendicular to DC

Calculate the area between the circle and the trapezoid (the empty area).

36.54

The trapezoid ABCD is drawn inside a circle.

The radius can be drawn from point O to point C.

DC = 12 cm
OK = 3 cm
NB = 4 cm
NK = 5 cm

Calculate the white area between the trapezoid and the circle's edge.

91.37

Look at the rectangle in the figure.

A semicircle is added to each side of the rectangle.

What is the area of the entire shape?

$32+20\pi$ cm².

The drawing shows an equilateral triangle

The length of each of its sides 7 cm

a semicircle is placed on each side of each side

What is the area of the entire shape? Replace $\pi=3.14$

78.91 cm².