8.04 Arc Length and Area of a Sector of a Circle Quiz QUESTION 1 How do you find the circumference of a circle? Show two different formulas. QUESTION 2 What is the arc measure of an arc with length 4.189 cm and radius equal to 3 cm QUESTION 3 Find the area of three-fifths of a circle with radius 15 ft. QUESTION 4 How do you find the area of a sector? Explain the two methods learned in this section. QUESTION 5 Find the arc length of a sector that is 125 and has a radius of 20 in. QUESTION 6 How do you find the arc length? Explain the two methods learned in this section. QUESTION 7 Find the area of a circle with diameter 18 ft. QUESTION 8 How do you find the area of a circle? QUESTION 9 Find the circumference of a circle with radius 8 inches. QUESTION 10 What is the arc measure of a sector with area 38.485 ft 2 and radius 7? QUESTION 11 Use the illustration below to calculate the circumference of the circle. 17.5 cm 15.7 cm 31.4 cm 78.5 cm QUESTION 12 If the circumference of a circle is 32 in, find the radius. Find the radius of the circle. 16 in 10.2 in 2.54 in 5.1 in QUESTION 13 Calculate the circumference of a circle with diameter 7.5. 11.78 23.56 23.57 47.12