, In triangle ABC, B =90°, AC=20cm and C=30° then the length of Ab will be
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here in triangle ABC
B = 90° , A = 30°
A + B + C = 180°
30 + 90 + C = 180°
C = 180 - 120
C = 60°
by 30°-60°-90°
BC= 1/2× AC ---(side opposite to 30°)
BC = 1/2×20
BC = 10 cm
AB =underoot 3/2×AC ----(side opposite to 60°)
AB = underoot 3/2×20
AB = 10 underoot 3
Step-by-step explanation:
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