ACTIVITY 3

PBL Tasks

Work in pairs to calculate the area of each of the following triangles:

1. A=1/2absinC

1/26x5sin120

12.99cm sq

2. The value of the included angle is

180-(30+67)=83

A=1/2x12x8sin83

47.64cm sq

3. The value of the included angle is 180-(110+47)=23

A=1/2absin23

1/2x14x17sin23

46.50cm sq