Elevation angles to a plane are measured from the plane are measured from the top and base of a building that is 20 m
a building that is 20 m high. The angle from
the roof is 38°, and from the base is 40°.
Calculate the altitude of the airplane​

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.

answer: rolling a number cube and flipping a coin.

step-by-step explanation: