The area of the shaded portion of the sign will be 182812.5 square millimeters.
The missing diagram is given below.
The area of the triangle is given as
A = 1/2 x B x H
Where B is the base and H is the height of the triangle.
The shades triangle in the sign had a base of 750 millimeters and a height of 650 millimeters, the white triangle in the sign has a base of 375 millimeters and a height of 325 millimeters.
The area of the big triangle will be
A₁ = 1/2 × 750 × 650
A₁ = 243750 square mm
The area of the small triangle will be
A₂ = 1/2 × 375 × 325
A₂ = 60937.5 square mm
Then the area of the shaded portion of the sign will be
A = A₁ - A₂
A = 243750 – 60937.5
A = 182812.5 square mm
More about the area of the triangle link is given below.
https://brainly.com/question/16653962
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