Question

Find the write angle to triangle ABC with B=90°and C=q°/AB/=10cm /AC/=20cm find angle q

Answer 1

Answer:

Draw a right angled △ABC using given instructions:

Here sin30=

AC

BC

2

1

=

20

BC

Or BC=10 cm

By Pythagoras theorem:

(AB)

2

=(AB)

2

−(BC)

2

=(20)

2

−(10)

2

=300

AB=10

3

cm.

solution