19. If = 20° subtends an arc on a circle of radius 5 ft, then the length of the arc is (a) 100 ft (b) 4 ft (c) 0.25 ft (d) 1.75 ft (e) 5729.58 ft

MLACB=3o°; Lensth of arc AB = 280 centfrmeters The Circumference of the Cirdleis Corite in whole number]

A stair stringer can be laid out very accurately by a carpenter using the Pythagorean Theorem to calculate length L. If the stairs are to have a rise of 6-3/4" and a run of 11-1/4", calculate length L, rounded to the nearest 16th of an inch. ise un stringer The length L'is inches. 券

6. What is the length of the arc with a measure of 100° in a circle with a radius of 15 inches?