Question

in a right angle triangle B=90 ,AC = 30, Ab =4a abd BC=3a​

Answer 1

Draw a right angled △ABC using given instructions:

Here sin30=

AC

BC

2

1

=

AC

6

Or AC=12 cm

By Pythagoras theorem:

(AB)

2

=(AC)

2

−(BC)

2

=(12)

2

−(6)

2

=108

AB=6

3

cm.

Answer 2

Answer:

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