Question

In ∆ABC, /_B=90°, /_C=60°, /_A=30°, AC=18cm find BC 
options
1) 10cm
2) 9√3cm
3) 6cm
4) 9cm​

Answer 1

Answer:

ΔABC is 30°-60°-90° triangle.

BC is the side opposite to 30°.

∴BC=12×hypotenuse

∴BC=12×AC

∴BC=12×18

∴BC=9cm