Circles and conic sections

Find the area of the sector.
Round your answer to the nearest tenth.

•  $436.2\ km^2$  

•  $175.9\ km^2$  

•  $31.4\ km^2$  

•  $24.9\ km^2$  

Find the area of the shaded region. Use 3.14 for π. Round to the nearest tenth.

• 31.4 m ²

• 28.3 m²

• 125.6 m²

• 282.6 m²

Calculate the area of a sector with central angle of 140° and radius of 8 cm.

• 224/9 cm² or ≈ 24.9 cm²
• 896 π/9 cm² or ≈ 312.8 cm²
• 4480 cm²
• 224 π/ 9 cm² or ≈ 78.2 cm²

What is the area of the white portion of the circle if you've found the area of the segment and A_segment = 14.68 m²

• 299.48 m²

• 229.48 m²

• 314.59 m²

• phone a friend

Find the area of the dark blue sector shown at the left. The radius of the circle is 4 units and the length of the arc (the curved edge of the sector) measures 7.85 units. Express answer in terms of  $\Pi$  .   $7.85=2.5\Pi$  

•  $0.3\Pi\ u^2$  

•  $5\Pi\ u^2$  

•  $6.3\Pi\ u^2$  

•  $16\Pi\ u^2$  

• Area of a Circle

• Circumference of a Circle

• Area of Sector

• Arc Length

• Segment of a Circle

Find the area of the shaded sector of circle O. The radius is 6 inches and the central angle is 100°. Express answer as an exact value

• 5π/3

• 10π/3

• 10π

• 40π

• the area

• the area of a segment

• the arc length

• the area of a sector

Match the following formulas.

• Area

• Circumference

• Area of Sector

• Arc Length

Find the area of the shaded sector.

• 17.8

• 53.4

• 19.9

• 59.7