Points A, B, and C are midpoints of the sides of right triangle DEF. Which statements are true? Select three options. (The formula for the area of a triangle is A = 101.) F С E O BC = 6 cm AC = 5 cm BA= 4 cm A B The perimeter of triangle ABC = 12 cm. DE = 10 cm FD = 6 cm FE = 8 cm The area of triangle ABC is 17 / 를 the area of triangle DEF. D

why are you giving so many marks make your marks less and make a question list so that i can understand your question very nicely

you estimate that the angle of elevation to the top of the 86th floor (the observatory) is 82 .the total height of the building is another 123 meters above the 86th floor.

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is there supposed to be a picture here?