Question

1. find the area. you may use a calculator.

Explanation:

Step1: Recall the formula for the area of a triangle

The formula for the area of a triangle is \( A=\frac{1}{2}\times base\times height\).

Step2: Identify the base and height

From the problem, the base \(b = 21\) and the height \(h=8\).

Step3: Substitute the values into the formula

Substitute \(b = 21\) and \(h = 8\) into \(A=\frac{1}{2}\times b\times h\). So \(A=\frac{1}{2}\times21\times8\).
First, calculate \(21\times8=168\). Then, \(\frac{1}{2}\times168 = 84\).

Answer:

\(84\)