Question

Find the area of triangle ABC if angle B = 120*, AB= 7cm and BC=6cm​

Answer 1

Answer:

21√3/2

Step-by-step explanation:

If we find other side angle of B then it is 60.

so according to trigonometry we use Sine rule so for that

Sin 60= x/6

(√3/2)=x/6

x=3√3

but x is the height of the triangle and we already have a base value

so as per the formula for area of triangle= 1/2 * height* base

= 1/2*3√3*7

=21√3/2

please marks as a brilliant answer

Answer 2

21 sq units.

Step-by-step explanation:

area of triangle ABC=1/2×B×H

=1/2×7×6

=42/2

=21squnits