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To find : LBCA or LC
Given: LB = 90°, BC= BA
Therefore, LA = LC ( If the adjacent sides are equal of a triangle then the corresponding angles will be equal)
Hence, we take LA = LC = x
= 90° +x + x = 180° ( Angles sum property of triangle)
=> 2x = 180° - 90°
=> x = 90°/2
=> x = 45°
therefore, LA = LC = 45°
Ans. LBCA = 45°
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