2. Stringed instruments produce a tone when a string is bowed, struck, or plucked. Where is the missing comma

Stringed instrument, any musical instrument that produces sound by the vibration ... The string may be struck, plucked, rubbed (bowed), or, occasionally, blown (by the ... No system of classification can adequately categorize the interactions. :]

area = 12 units²

Step-by-step explanation:

The perimeter of a plane figure is the distance around it.

The triangle has sides that measure 2 units, 5 units, and 5.39 units. It means that the perimeter of the rectangle would be

2 + 5 + 5.39 = 12.39 units

The circumference of a circle is the same as its perimeter.

Perimeter of circle = 2πr

Where

r represents the radius of the circle.

π is a constant whose radius is 3.14

If the circumference of the circle and the perimeter of the triangle is the same, then

2 × 3.14 × r = 12.39

6.28r = 12.39

r = 12.39/6.28

r = 1.97

Area of circle = πr²

Therefore,

Area of circle = 3.14 × 1.97² =

12 units²