cuppykittyy
16.04.2020 •
Mathematics
Whats the value of x
1/2 - 9 = 36
is it 54 or 45 IDK
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Ответ:
a)Find x and y
BCD=ACB+ACD
180°=ACB+150°
ACB=180°-150°
ACB=30°
since triangle ABC is an isosceles triangle
therefore, AB=BC
BAC=ACB
y=ACB=30°
ACB+ABC+BAC=180°
ABC+2BAC=180°
ABC+2*30°=180°
ABC=180°-60°
ABC=120°
X=120°