INSCRIBED SHAPES

The diameter of a DVD is 12.0 cm. The diameter of the hole in the centre is 1.5 cm.  Find the area of the paper needed for the DVD label. Area CD = pi r2 Radius = diameter/2 Radius = 12/2 Radius = 6 12.0cm 1.5cm Area CD = pi r2 Area CD = 3.14 x 6 x 6 Area CD = 113.04cm2

The diameter of a DVD is 12.0 cm. The diameter of the hole in the centre is 1.5 cm.  Find the area of the paper needed for the DVD label. Area hole = pi r2 Radius = diameter/2 Radius = 1.5/2 Radius = 0.75 12.0cm 1.5cm Area hole = pi r2 Area hole = 3.14 x 0.75 x 0.75 Area hole = 1.76625cm2

The diameter of a DVD is 12.0 cm. The diameter of the hole in the centre is 1.5 cm.  Find the area of the paper needed for the DVD label. Area label = Area CD – Area hole Area CD = 113.04cm2 Area hole = 1.76625cm2 12.0cm 1.5cm Area label = 113.04 – 1.76625 Area label = 111.27cm2

If you are going to cut the label out of a square piece of construction paper that measures 12cm by 12cm, how much of the paper will you be throwing in the garbage? 12.0cm Area wasted paper = Area paper – Area label Area paper = side2 Area paper = 12 x 12 12.0cm 1.5cm Area paper = 144cm2 Area label = 111.27cm2 Area wasted paper = 144 – 111.27 Area wasted paper = 32.73cm2