Angle measure labeled a
The arc mesure labeled c

a = 24°

Step-by-step explanation:

Draw a radius from to the end of the chord.

The angle in the small sector is equal to the arc angle of 48°

The exterior angle is the supplement 180 - 48 = 132°

The isosceles triangle has two angles a of (180 - 132)/2 = 24°

This can be generalized to the angle between the chords is half of the arc angle when one chord is a diameter and the chords share a common endpoint.

lo.lll

step-by-step explanation:

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

hope this !