Tan45=ab/bc ,Bc=80 find ab
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Answer:Tan45°= Ab/BC
1=ab/BC
AB=BC
Tan30°= AB/BD
1/√3= AB/BD
1/√3=AB/BC+20
1/√3=AB/AB+20
AB+20=√3AB
20=√3AB-AB
20=AB(√3-1)
20=AB(0.732). (taking √3=1.732)
AB=20/0.732
therefore, AB=BC= 27.322
Step-by-step explanation:
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