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I am Lyosha [343]
2 years ago
12

A circle has a diameter of 20 ft. What is the diameter? *

Mathematics
2 answers:
fenix001 [56]2 years ago
3 0

Answer:

20ft

Step-by-step explanation:

Montano1993 [528]2 years ago
3 0

Answer:

20 ft lol

Step-by-step explanation:

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(1) See below for a diagram. Basically, the distance on the ground from the person to the building (34 ft) is adjacent to the angle of elevation (74 degrees) and the height of the building (labeled h in the diagram) is the side opposite the angle. Since we are dealing with opposite and adjacent we use the tangent of the angle and tan = opp/adj

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(2) Here since P & Q are complimentary it means that their sum is 90 degrees. Since this is a right triangle that means that the remaining angle (R) must be the right angle. See below for a diagram.

sin = opp/hyp. As the sin Q =  9/41 this means that 9 is the length of the side opposite Q (the side PR) and 41 is the length of the hypotenuse. This makes the remaining side (QR) 40 in length.

cos = adj/hyp. If we focus on angle P the side adjacent (next to) is 9 and the hypotenuse is 41. Thus the cos of P = 9/41.

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