## anonymous 5 years ago ANY1 HELP ME PLEASE The ratio of the radii of two circles at the centers of which two arcs of the same length subtended a angles of 60 degree and 70 degree is

1. watchmath

arc 1 =$$60/360\cdot 2\pi r_1$$ arc 2 = $$70/360\cdot 2\pi r_2$$ Since arc 1=arc 2 if we divide the first by the second we have $$1=6/7\cdot r_1/r_2$$ So $$r_1/r_2=7/6$$ where r1 is the outer radius and r2 is the inner radius

2. anonymous

YES BUT IT IS NOT THE OPTION SO I SHOULD THINK THAT THE QUESTION IS WRONG

3. watchmath

what are the options?

4. anonymous

A) 5:4 B) 4:5 C) 2:6 D) 4:3

5. myininaya

ok i don't mean to sound like a retard but can you tell me what subtended means

6. anonymous

extend opposite angle: to be opposite and delimit the extent of an angle or side of a geometric figure was not found in the English Dictionary .

7. anonymous

Subtended is a code word to let you know they are referring to a sector of a circle; they would usually say the subtended angle; referring to the sector bounded by radii, arc and subtended angle.