Hello, may i have some on these 4 questions? very much! {also, if you could answer them quick, that would be highly appreciated! }

1.

Parallelogram with base a = 20 in. and height h = 16 in.
Triangle with base a = 20 in. and height b = 8 in.

so:



2.

Trapezoid with base b₁ = 14 cm, base b₂ = 4 cm and height h = 10 cm
Triangle with base b₁ = 14 cm and height x = 18 cm - 10 cm = 8 cm

so:



3.

We have three rectangles:



4.

Area of a circle:



Area of a rectangle:



Area of the shaded region: