If Triangle ABC is isosceles with AB = AC is: 13.45 cm.
Triangle ABC
∆ABC = 85 cm² .
(1/2) ×AC×AB ×sinA = 85 cm²
AC=AB=x
Hence:
85= (1/2)x²×sin110°
A² × sin 110° = 170
A² ×0.94 = 170
A² = 170/0.94
A² =√ 180.85
A= 13.45 cm
Therefore if Triangle ABC is isosceles with AB = AC is: 13.45 cm.
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