Question

what is the area? 9 mm 13.7 mm square millimeters

Explanation:

Step1: Recall triangle - area formula

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

Step2: Identify base and height

The base of the triangle is $b = 13.7$ mm and the height is $h=9$ mm.

Step3: Calculate the area

$A=\frac{1}{2}\times13.7\times9=\frac{13.7\times9}{2}=\frac{123.3}{2}=61.65$ square - millimeters.

Answer:

$61.65$