= 12? ×3. 14÷6
=75.36
12.56×6=75.36 60 degrees is one sixth of a circle 1 The circumference of a circle is 75.36.
75.36÷3. 14÷2= 12 is the radius.
12? ×3. 14=452. 16 is the area of the circle.
452. 16÷6 =75.36 is the sector area.
Two (8/2)? ×3. 14-2? ×3. 14 The reduced area is equal to the area of this CD.
=4? ×3. 14-2? ×3. 14
=50.24- 12.56
=37.68