38. The circumference of a circle is 26 π 26 pi  in. What is its area? Leave your answer in terms of π . pi .
39. In a circle, a 90 ° 90 degrees  sector has area 36 π in . 2 . 36 pi . in , . squared , .  What is the radius of the circle?
40. Open-Ended Draw a circle and a sector so that the area of the sector is 16 π   cm 2 . 16 pi . , cm squared , .  Give the radius of the circle and the measure of the sector's arc.
41. A method for finding the area of a segment determined by a minor arc is described in this lesson.
    1. Writing Describe two ways to find the area of a segment determined by a major arc.
    2. If m A B ⌢ = 90 m , modified eh b with frown above . equals 90  in a circle of radius 10 in., find the areas of the two segments determined by A B ⌢ modified eh b with frown above

Find the area of the shaded segment to the nearest tenth.

C Challenge

Find the area of the shaded region. Leave your answer in terms of π . pi .

45. 
46. 
47. 
48. Recreation An 8 ft-by-10 ft floating dock is anchored in the middle of a pond. The bow of a canoe is tied to a corner of the dock with a 10-ft rope, as shown in the picture below.
    1. Sketch a diagram of the region in which the bow of the canoe can travel.
    2. What is the area of that region? Round your answer to the nearest square foot.

Table of Contents