17. Two trapezoids have areas of 432 cm2and 48 cm2. Find their ratio of similarity.
3 : 1
9 : 1
1 : 3
1 : 9
18. Find the similarity ratio and the ratio of perimeters for two regular octagons with areas of 18 in.² and 50 in.².
3 : 5; 3 : 5
9 : 25; 3 : 5
3 : 5; 9 : 25
9 : 25; 9 : 25
19. Find the area of the regular polygon. Give the answer to the nearest tenth.
dodecagon with a perimeter of 108 cm
1,813.8 cm2
906.9 cm2
923.6 cm2
938.9 cm2
20. Find the area of the regular polygon. Give the answer to the nearest tenth.
pentagon with a side of 7 ft
16.9 ft2
84.3 ft2
67.4 ft2
168.6 ft2
21. Find the area of the regular polygon. Give the answer to the nearest tenth.
hexagon with a side of 10 in.
519.6 in.2
52 in.2
15 in.2
259.8 in.2
3 : 1
9 : 1
1 : 3
1 : 9
18. Find the similarity ratio and the ratio of perimeters for two regular octagons with areas of 18 in.² and 50 in.².
3 : 5; 3 : 5
9 : 25; 3 : 5
3 : 5; 9 : 25
9 : 25; 9 : 25
19. Find the area of the regular polygon. Give the answer to the nearest tenth.
dodecagon with a perimeter of 108 cm
1,813.8 cm2
906.9 cm2
923.6 cm2
938.9 cm2
20. Find the area of the regular polygon. Give the answer to the nearest tenth.
pentagon with a side of 7 ft
16.9 ft2
84.3 ft2
67.4 ft2
168.6 ft2
21. Find the area of the regular polygon. Give the answer to the nearest tenth.
hexagon with a side of 10 in.
519.6 in.2
52 in.2
15 in.2
259.8 in.2
-
17.
ratio of similarity = ratio of area
432/ 48
9/1 = 9:1.
18.
simi ratio = 18/50
= 9/25 = 9 : 25
perimeter ratio = 15.74/25.74 = approx = 3: 5
19. 906.9 sq cm
20. 84.3 sq ft
21. 259.8 sq in
ratio of similarity = ratio of area
432/ 48
9/1 = 9:1.
18.
simi ratio = 18/50
= 9/25 = 9 : 25
perimeter ratio = 15.74/25.74 = approx = 3: 5
19. 906.9 sq cm
20. 84.3 sq ft
21. 259.8 sq in