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Mathematics 10 Online
OpenStudy (anonymous):

A.)A bird sits at the top of the pole. From its perspective, the angle of depression to point D on the hillside is ___ degrees. (Enter only the number.) B.)The measure of the angle formed by the pole and the guy wire that attaches to the hill is ____ degrees. (Enter only the number.) C.)If point D on the hill is 5 feet 6 inches above the base, B, of the pole, what is the shortest distance to the nearest inch, from D to the pole? Express your answer in feet and inches, such as 3 feet 10 inches. (Hint: Find the length of ED.) https://courseplayer.avalearning.com/CourseFiles/Questions/846786

OpenStudy (anonymous):

@Michele_Laino

OpenStudy (anonymous):

@shaik0124 @starlord6200 @Destinyyyy @rational

OpenStudy (anonymous):

not authorized to see the question

OpenStudy (michele_laino):

The server told me that I'm not able to see that page: access denied

OpenStudy (anonymous):

Ok, let me try again

OpenStudy (michele_laino):

ok!

OpenStudy (michele_laino):

ok! now I see your drawing!

OpenStudy (anonymous):

yay!

OpenStudy (michele_laino):

I think that the tringles ABC and ABD are similar each other

OpenStudy (michele_laino):

Since they are two rectangle triangles, and they have a side in common, namely the side AB. So we can say that the measure of angle ABD is 65 degrees

OpenStudy (anonymous):

Ok, I still do not get it

OpenStudy (michele_laino):

please wait a moment, I'm searching for a justification for a congruence between those 2 triangles

OpenStudy (michele_laino):

or similarity

OpenStudy (michele_laino):

I think that we can make the subsequent hypothesis, namely the 2 angles, CAB and DAB are congruent each other

OpenStudy (michele_laino):

so we have two rectangle triangles, which have a couple of angle congruent, namely CAB is congruent to DAB. Then those triangles are similar since they have two pairs of congruent angles. Keep in mind that angles ADB and ABC are congruent too

OpenStudy (anonymous):

Ok

OpenStudy (michele_laino):

So, we can say that the angle ABD is congruent to angle ACB, so the measure of angle ABD has to be equal to 65 degrees

OpenStudy (anonymous):

I am very confused..

OpenStudy (michele_laino):

more explanation: |dw:1431720278696:dw|

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