What is the area of sector GHJ, given that θ=pi/4 radians? Express your answer in terms of π and as a decimal rounded to the nearest tenth. Show your work.

Radius of circle = r = 5 cm

Angle made by the arc = Ф = π/4 radians

Area of sector = A = ?

The formula for the area of a sector is:

A = 0.5r²Ф

Using the values, we get:

A = 0.5 x (5) ² x π/4

A = 3.125π cm²

Rounded of to nearest tenth, the area of the sector GHJ is 3.1π cm²