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raylener5841
18.03.2021 •
Mathematics
11
Janet has one rectangular-shaped paper with a length of foot and a width of
12
4
foot.
Part B
1
Janet decides to cut off foot from the length of her paper. What is the area, in square feet, of the plece of paper after she
18
cuts off root from the length? Show your work with expressions or equations.
Enter your answer and your work in the box provided.
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Ответ:
13.2 ft.
Step-by-step explanation:
In the given ΔABC
tanA =
= ![\frac{BC}{AB}](/tpl/images/0027/8705/02b7d.png)
tan 31° =![\frac{x}{22}](/tpl/images/0027/8705/eb083.png)
x = 22 tan 31°
= 22 × (0.6009)
= 13.22 ≈ 13.2 ft.