#2
a. determine the value of s, the arc length (measured in inches) cut off in a circle with a radius of 3 inches by an
angle with a measure of 5.5 radians.
inches
b. determine the measure of an angle (in radians) that cuts off an arc length of 6.4 inches in a circle with a 3.9
inch radius
radians
c. determine the length of the radius of the circle (measured in feet) when the angle has a measure of 126
degrees and cuts off an arc length of 49 feet.
feet

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle