91Ó°ÊÓ

Find the circumference of the circle with the given radius or diameter. \(d=8.2\) in.

Calculate the indicated areas. All data are accurate to at least two significant digits. The widths (in \(\mathrm{m}\) ) of half the central arena in the Colosseum in Rome are shown in the following table, starting at one end and measuring from the middle to one side at \(4.0 \mathrm{m}\) intervals. Find the area of the arena by the trapezoidal rule. $$\begin{array}{lrrrrrr}\text { dist. from middle (m) } & 0.0 & 4.0 & 8.0 & 12.0 & 16.0 & 20.0 \\\\\text { width (m) } & 55.0 & 54.8 & 54.0 & 53.6 & 51.2 & 49.0 \\\\\text { dist. } & 24.0 & 28.0 & 32.0 & 36.0 & 40.0 & 44.0 \\\\\text { width } & 45.8 & 42.0 & 37.2 & 31.1 & 21.7 & 0.0 \end{array}$$

Find the area of the circle with the given radius or diameter. $$r=0.0952 \mathrm{yd}$$

Find the area of each figure. Square: \(\quad s=2.7 \mathrm{mm}\)

Find the volume or area of each solid figure for the given values. See Figs. 2.109 to 2.115 . Volume of regular pyramid: square base of side 0.76 in. \(h=1.30\) in.

Find the area of each triangle. Right triangle with legs \(3.46 \mathrm{ft}\) and \(2.55 \mathrm{ft}\)

In Exercises \(13-20,\) find the area of each figure. Square: \(\quad s=2.7 \mathrm{mm}\)

Find the area of each figure. Square: \(\quad s=15.6 \mathrm{ft}\)

Find the area of the circle with the given radius or diameter. $$r=45.8 \mathrm{cm}$$

Find the area of each triangle. Right triangle with legs \(234 \mathrm{mm}\) and \(342 \mathrm{mm}\)