The third option is the answer
Step-by-step explanation:
Half of pi/3 means 1/2 times pi/3=pi/6
122.5.
A=b x h/2. A=122.5 b=7
A x b=h
122.5 x 7 =122.5
Angle PTG = arccos((18^2 + 13^2 - 27^2) / (2 x 18 x 13)) = arccos(-236 / 468) = arccos(-0.5043) = 120 degrees.
The triangle is an obtuse triangle (because one of the angles is greater than 90 degrees) and a scalene triangle (because all the sides are not equal).
