Question

1) In ∆ABC, angleB=90° ,angleA=60°, If AC=24 cm then I(AB)= ? * O A) 12 cm B) 12√3 cm O C) 16 cm O D) 16√3 cm​

Answer 1

Answer:

△ ABC is a right-angled triangle.

By Pythagoras theorem,

AC

2

=BC

2

+AB

2

⇒13

2

=5

2

+AB

2

⇒AB

2

=−(5)

2

+13

2

⇒AB

2

=−25+169

⇒AB

2

=144

⇒AB=

144

⇒AB=12 cm.