You are walking near a river. While standing at A, you measure an angle of 90° between B and C, as shown. You then walk to B and measure an angle of 81° between A and C. The distance between A and B is about 1 mile. How wide (in miles) is the river between A and C? Round your answer to the nearest tenth.

256π units²   (answer b)

step-by-step explanation:

the formula for the surface area of a sphere of radius r

is             a = 4πr²

and so, if r = 8 units, then the surface area is:

a = 4π(8 units)² = 256π units²   (answer b)

what is the approximate angle of acb if abc is 25cm and the length of segment bc is 15

step-by-step explanation:

idk

step-by-step explanation:

27

step-by-step explanation: