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evanwall91
31.03.2020 •
Mathematics
A triangle one angle measuring 3x degrees a second angle measures 2x+20 degrees and the third measures 4x-20 degrees. what is the value of x
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Ответ:
x=20
Step-by-step explanation:
Because all angles of a triangle add up to 180, by adding all the values that your given and setting it equal to 180, you get the value of x.
3x+2x+20+4x-20=180
9x=180
x=20
Ответ:
the formula that relates those three variables is:
tan(40°) = opposite leg / adjacent leg = height / 2 m
or, which is equivalent, cot (40°) = adjacent leg / opposite leg = 2m / height
=> height = 2m / cot (40°).
which is the option c of the list.