Question

#3
area:
(the triangle has a base of 5.6cm and a height of 2.8cm, with the height shown as a dashed line from the opposite vertex to the base.)

Explanation:

Step1: Recall triangle area formula

The formula for the area of a triangle is \( A=\frac{1}{2}\times base\times height \). Here, the base is \( 5.6\space cm \) and the height is \( 2.8\space cm \).

Step2: Substitute values into formula

Substitute \( base = 5.6 \) and \( height = 2.8 \) into the formula: \( A=\frac{1}{2}\times5.6\times2.8 \).
First, calculate \( 5.6\times2.8 = 15.68 \). Then, multiply by \( \frac{1}{2} \): \( \frac{1}{2}\times15.68 = 7.84 \).

Answer:

The area of the triangle is \( 7.84\space cm^2 \).