Question

1. find the perimeter and area of the rectangle.

2.1 mm
3.9 mm

Explanation:

Step1: Calculate rectangle perimeter

Perimeter formula: $P = 2(l + w) = 2(3.9 + 2.1)$
$=2\times6 = 12$ mm

Step2: Calculate rectangle area

Area formula: $A = l\times w = 3.9\times2.1$
$=8.19$ mm²

Answer:

Perimeter: $12$ mm, Area: $8.19$ mm²