gsgeheh81
gsgeheh81
20-02-2021
Mathematics
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trebor5x
trebor5x
20-02-2021
4*((7x-6)+(4x-3))=360
7x-6+4x-3=90
11x=99
x=9
∠ACD
= (7x-6)=7*9-6
= 57°
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SanaeNoob
SanaeNoob
20-02-2021
BD is the angle bisector of ∠ADC
Therefore ∠ADC=(8x-6)°
Same for ∠DCB, AC bisects ∠DCB
Therefore ∠DCB=(14x-12)°
Because AD//BC, ∠DCB+∠ADC=180°
i.e. 22x-18=180
x=9
Answer Link
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