3.
the following diagram shows the triangle abc.
13.6
5
diagram not to scale
the angle at c is obtuse, ac = 5 cm, bc = 13.6 cm and the area is 20 cm.
(a)
find acb.
ac 5
sohcah to a
ārtet
b
700m2
a yoabotn c
als usine
(b)
find ab.
(3)
(total 7 marks)