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Lesson 1 Menu

Name the reflected image of RS in line l . 2. Name the reflected image of ST in line l . 3. Name the reflected image of  RWT in line l . 4. Find the length of the image of MN under a dilation with scale factor r = –3 and MN = 9.

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Lesson 1 Menu

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  1. Name the reflected image of RS in line l. 2. Name the reflected image of ST in line l. 3. Name the reflected image of RWT in line l. 4. Find the length of the image of MN under a dilation with scale factor r = –3 and MN = 9. 5. Find the magnitude and direction of for A(4, 2) and B(–2, –1). Lesson 1 Menu

  2. Identify and use parts of circles. • Solve problems involving the circumference of a circle. • circle • diameter • circumference • pi () • center • chord • radius Lesson 1 MI/Vocab

  3. Identify Parts of a Circle A. Name the circle. Lesson 1 Ex1

  4. Identify Parts of a Circle B. Name a radius of the circle. Lesson 1 Ex1

  5. Identify Parts of a Circle C. Name a chord of the circle. Lesson 1 Ex1

  6. Identify Parts of a Circle D. Name a diameter of the circle. Lesson 1 Ex1

  7. Find Radius and Diameter Formula for radius Substitute and simplify. Answer: 9 Lesson 1 Ex2

  8. Find Radius and Diameter Since all radii are congruent, RN = RP. Answer: So, RP = 2. Lesson 1 Ex2

  9. A • B • C • D A. 6.25 B. 12.5 C. 25 D. 50 Lesson 1 CYP2

  10. A • B • C • D A. 7.25 B. 14.5 C. 29 D. 58 Lesson 1 CYP2

  11. A • B • C • D A. 4.25 B. 8.5 C. 17 D. 85 Lesson 1 CYP2

  12. Find Measures in Intersecting Circles Lesson 1 Ex3

  13. Since the diameter of , EF = 22. Since the diameter of FZ = 5. is part of . Find Measures in Intersecting Circles Segment Addition Postulate Substitution Simplify. Answer: 27 mm Lesson 1 Ex3

  14. A • B • C • D A. 2.5 in. B. 4.5 in. C. 6.5 in. D. 9 in. Lesson 1 CYP3

  15. A • B • C • D A. 13.5 in. B. 15.5 in. C. 13 in. D. 12.5 in. Lesson 1 CYP3

  16. Lesson 1 KC1

  17. Find Circumference, Diameter, and Radius A. Find C if r = 13 inches. Circumference formula Substitution Answer: 26 or ≈ 81.68 in. Lesson 1 Ex4

  18. Find Circumference, Diameter, and Radius B. Find C if d = 6 millimeters. Circumference formula Substitution Answer: 6 or ≈ 18.85 mm Lesson 1 Ex4

  19. Divide each side by . Find Circumference, Diameter, and Radius C. Find d and r to the nearest hundredth if C = 65.4 feet. Circumference formula Substitution Use a calculator. Lesson 1 Ex4

  20. Find Circumference, Diameter, and Radius Radius formula Use a calculator. Answer:d ≈ 20.82 ft; r ≈ 10.41 ft Lesson 1 Ex4

  21. Use Other Figures to Find Circumference Lesson 1 Ex5

  22. Use Other Figures to Find Circumference The radius of the circle is the same length as either leg of the triangle. The legs of the triangle have equal length. Call the length x. Pythagorean Theorem Substitution Simplify. Divide each side by 2. Take the square root of each side. Lesson 1 Ex5

  23. Use Other Figures to Find Circumference So the radius of the circle is 3. Circumference formula Substitution Answer: 6 Lesson 1 Ex5

  24. A. B. C. D. • A • B • C • D Lesson 1 CYP5

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