Can someone help me, I don't understand this. There are 3 parts to this question. Part A, Part B, and Part C.
Ken wants to make a triangular sunshade to cover his deck. The shade is made of two identical right triangles. Based on this, Answer Parts A, B, and C below.
(Go to my profile to see Part A)

Part B:
Ken decides to increase the length of the 15-foot side to 18 feet and decrease the overall length to 20 feet. What is the new height of the shade?
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In one day there are too high tides into low tides and equally spaced intervals the high tide is observed to be 6 feet above the average sea level after six hours passed a low tide occurs at 6 feet below the average sea level in this task you will model this occurrence using a trigonometric function by using x as a measurement of time assume the first high tide occurs at x=0. a. what are the independent and dependent variables? b. determine these key features of the function that models the tide: 1.amplitude 2.period 3.frequency 4.midline 5.vertical shift 6.phase shift c. create a trigonometric function that models the ocean tide for a period of 12 hours. d.what is the height of the tide after 93 hours?

8.74 rounded to the nearest whole number

Which best explains why this triangle is or is not a right triangle ?