Geometry · Chapter 10 · Lesson 10.4 · Printable PDF

Sectors, Segments and Their Areas Worksheet with Answer Key

8 problems on sectors, segments and their areas: sector area from radius and angle, a sprinkler, equal-area sectors, a folding fan, a sawn tabletop, a circle cut by a line, and a dog on a leash. 2 pages, with a worked answer key.

8 problems2 pagesanswer key
Printable Sectors, segments and their areas worksheet with answer key - Geometry (Page 1 PDF preview)
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What's on the worksheet

  1. Find the area of each sector exactly in terms of pi:
    r = 12,\ \theta = 30^\circr = 3,\ \theta = 160^\circd = 20,\ \theta = 270^\circr = 2\sqrt{3},\ \theta = 150^\circr = 10,\ s = 7\pi
  2. Find the area watered by a sprinkler that swings through 20 degrees.
  3. Find the angle or radius that gives a sector the same area as sector P.
  4. Find the area and opening angle of a folding fan from its rib length and edge.
  5. Find the area of the piece sawn off a round table and what is left.
  6. Find where a line cuts a circle and the area of the part above it.
  7. Compare two sectors with the same arc length but different radii.
  8. Find the area of field a dog tied to the corner of a shed can reach.

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