Question

1. triangle
2. square
3. rectangle

a. a = s²
b. a = lw or a = bh
c. a = \frac{bh}{2}

Explanation:

Step1: Recall the area formula for a triangle

The area formula for a triangle is \(A=\frac{bh}{2}\), where \(b\) is the base and \(h\) is the height.

Step2: Recall the area formula for a square

The area formula for a square with side length \(s\) is \(A = s^{2}\).

Step3: Recall the area formula for a rectangle

The area formula for a rectangle with length \(l\) and width \(w\) (or base \(b\) and height \(h\)) is \(A=lw\) or \(A = bh\).

Answer:

1. C. \(A=\frac{bh}{2}\)
2. A. \(A = s^{2}\)
3. B. \(A=lw\) or \(A = bh\)