18. [-/4 Points] DETAILS AUFEXC4 7.3.009. Consider the following when r = 7 cm. Give both exact values and approximations to the nearest hundredth. (a) Find the circumference of the figure. Cm ~ cm (b) Find the area of the figure. cm ~ cm 220. [-/1 Points] DETAILS AUFEXC4 7.4.003. Find the ratio of the lengths of corresponding sides for the similar triangles. smaller/larger = 8 in. 6 in. 9 in. 12 in. Need Help? Read It 21. [-/1 Points] DETAILS AUFEXC4 7.4.005. Triangles ABC and DEF are similar triangles. Use this fact to solve the exercise. Round to the nearest tenth. Find side DE. Let J = 8, K = 9, and L = 22. cm E B J cm A K cm C D L cm19. [-/4 Points] DETAILS AUFEXC4 7.3.011. Consider the following. Give both exact values and approximations to the nearest hundredth. 4.9 mi (a) Find the circumference of the figure. mi ~ mi (b) Find the area of the figure. mizTriangles ABC and DEF are similar triangles. Solve. Round to the nearest tenth. Find the height of triangle DEF. m 5 m height 3 m 2 m B D E Need Help? Read It Watch It 23. [-/1 Points] DETAILS AUFEXC4 7.4.009. MY NO Triangles ABC and DEF are similar triangles. Use this fact to solve the exercise. Round to the nearest tenth. Find the perimeter of triangle ABC. m E B 9 m 5 m A F 12 m D C 4m17. [0/2 Points] DETAILS PREVIOUS ANSWERS AUFEXC4 7.3.007. Consider the following. 5 ft 8 ft 16 ft (a) Find the perimeter of the figure. x ft (b) Find the area of the figure. ft 2