Determine `pi^2` with due regard for significant figures. [Given `pi`- 3.14]

The diameter of a circle is 2.486 m . Calculate its area with due regard to significant figures

State the number of significant figure in the following. .007 m^2

State the number of significant figures in the, following: 0.0006032 m^2

State the number of significant figures in the, following: 6..320 N m^(-2)

State the number of significant figure in the following. .0006032 m^2

State the number of significant figures in the, following: 0.2370 g cm^(-3)

In figure 12 PS is a diameter of a circle whose radius is 6cm . Two pint Q and R are taken on PS such that PQ= QR = RS . Two Semi-circles are drawn with PQ and QS as their respective diameters as shown in the figure. find the perimeter and the area of the shaded region shown in figure. (Take pi=3.14 )

In Fig 12,PS is a diameter of a circle whose radius is 6 cm.Two points Q and R are taken on PS such that PQ=QR=RS.Two semicircles are drawn with PQ and QS as their respective diameters as shown in the figure.Find the perimeter and the area of the shaded region shown in figure. (pi=3.14)

A chord of a circle of radius 12cm subtends an angle of 120^@ at the center. Find the area of the corresponding segment of the circle.(use pi=3.14 and sqrt3=1.73 )

Find the areas of the circle of radius 3.458 cm upto correct significant figures.