Answer:
A = 3/2 a² + 4b²
Step-by-step explanation:
The area of a trapezoid is:
A = ½ (w₁ + w₂) h, where w₁ and w₂ are the lengths of the parallel sides and h is the height.
The area of a rectangle is:
A = wh, where w is the width and h is the height.
The total area is:
A = ½ (a + 2a) (a) + (b) (4b)
A = 3/2 a² + 4b²
