vanessasantos2004vs
29.09.2019 •
Mathematics
The interor angles of a triangle have measures 100 degrees 4y+25 degrees and 3y+20 degrees whats the value of y
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Ответ:
y = 5
Step-by-step explanation:
The 3 interior angles of a triangle sum to 180°
Sum the 3 given angles and equate to 180
100 + 4y + 25 + 3y + 20 = 180 ← simplify left side
7y + 145 = 180 ( subtract 145 from both sides )
7y = 35 ( divide both sides by 7 )
y = 5
Ответ: