Lesson 20T ~ Parts of Circles Name Period Date 1. Draw a diameter. 2. Draw a chord. 3. Draw a central angle. 4. Draw a radius. 5. Give two names for the line drawn in the circle. Given the radius, find the diameter of each circle. 6. 5 ft 7. 8 mm 8. 0.5 cm Given the diameter, find the radius of each circle. 9. 10 cm 10. 6 yd 11. 1.2 mm Find the degree measurement of angle 1 in each circle. 12. 13. 180 1 180 1 90 360 180 Find the probability that a dart that randomly lands on the circle will land on the shaded area. 14. 15. 90 120 shaded degrees 360 90 360
Lesson 21T ~ Circumference of a Circle Name Period Date Find the circumference of each circle. Round each answer to the nearest tenth. Use 3.14 for π. 1. 2. 3. 4. 2 cm 30 cm 4 ft diameter circumference circumference circumference 4. 5. 6. 5 mi 1.5 in 1 m 2 diameter diameter circumference circumference circumference 7. diameter 12 in 8. radius 3 ft 9. radius 4.5 yd diameter diameter circumference circumference circumference 10. Eduardo runs around a circular track with a diameter of 400 feet. Find the distance he runs in one lap. 11. Olivia used 3 forπ when finding the circumference of the circle. She got an answer of 6 inches. Is the actual circumference more than or less than 6 inches. Why? 2 in
Lesson 22T ~ Perimeter and Circumference Name Period Date Find each stated missing length. 1. diameter of half circle 2. base of rectangle 3. height of rectangle 8 cm 10 ft 9 ft 6 in 10 in 8 cm 10 in 8 in Find the perimeter of each shape. yd 4. 5. yd 3 yd in in 8 in 10 in 6 in 5 yd 6 in in m 6. 7. m 4 m 5 m m 2 cm 2 cm 3 cm 3 cm cm cm
Lesson 23T ~ Similar and Congruent Figures Name Period Date Determine whether each pair of figures is similar, congruent or neither. 1. 2. 3. 4. 5. 6. Sketch a figure similar, but not congruent, to each shape. 7. 8. Sketch a figure congruent to each shape. 9. 10. D 11. CAT is similar to DOG. a. List the corresponding sides and angles. 4 in CA corresponds to C corresponds to AT corresponds to A corresponds to CT corresponds to T corresponds to G 8 in 6 in C 2 in T 4 in 3 in O A b. Find the ratio of each side in CAT to the corresponding side in DOG. CA DO AT OG CT DG
Lesson 24T ~ Ratios and Similar Figures Name Period Date The ratio of perimeters is equal to the ratio of corresponding sides in similar figures. Find the ratio of the perimeters or circumferences in each pair of similar figures below. 1. 2. 1 ft 2 ft 4 in 7 in The perimeters for each pair of similar figures are shown. Find the ratio of the corresponding sides in simplest form. 3. 4. perimeter 10 ft perimeter 30 ft perimeter 12 in perimeter 24 in Use ratios to find the missing perimeter for each pair of similar figures. 1 5. ratio of corresponding sides 2 1 in 2 in perimeter 6 in perimeter? in ratio of perimeters? 6 1 set ratios equal and use equivalent fractions to solve 2 6 6 Left rectangle in numerator of both fractions! 6
Use ratios to find the missing perimeter for each pair of similar figures. 6. ratio of corresponding sides 2 ft perimeter 6 ft 5 ft perimeter? ft ratio of perimeters set ratios equal and use equivalent fractions to solve Use ratios to find the missing corresponding side length for each pair of similar figures. 7. 8. 2 cm? cm perimeter 6 cm perimeter 12 cm? m perimeter 10 m 15 m perimeter 30 m