We would apply the formula for determining the area of a triangle which is expressed as
Area = 1/2 x base x height
From the information given,
base = 6 cm
height = 1.46 cm
We would convert each value to mm
Reacll, 1cm = 10 mm
Thus,
6 cm = 6 * 10 = 60 mm
1.46 cm = 1.46 * 10 = 14.6 mm
Thus,
Area = 1/2 x 60 x 14.6
Area = 438 mm^2