Question

find the area of this irregular shape. a = ? cm² find the area of the first rectangle.

Explanation:

Step1: Calculate the area of the first rectangle

The formula for the area of a rectangle is \(A = l\times w\). For the first rectangle (the one with height \(5\) cm and width \(3\) cm), \(A_1=5\times3 = 15\) \(cm^{2}\).

Step2: Calculate the area of the second rectangle

For the second rectangle (with height \(3\) cm and width \(8\) cm), using the area formula \(A = l\times w\), \(A_2 = 3\times8=24\) \(cm^{2}\).

Step3: Sum up the areas

The total area \(A=A_1 + A_2\). Substitute \(A_1 = 15\) and \(A_2=24\) into the equation: \(A=15 + 24=39\) \(cm^{2}\).

Answer:

\(39\)