Question

12: déterminez laire et le périmètre des figures suivantes. b)

Explanation:

Step1: Calculate perimeter of the figure on the right

Add up all side - lengths. The side - lengths are 6 inches, 6 inches, 2.5 inches, 5 inches.
$P = 6+6 + 2.5+5=19.5$ inches
Since we don't have enough information about the figure on the left (the curved part's length is not clear for perimeter and area calculation), we will focus on the figure on the right for area.

Step2: Calculate area of the figure on the right

We can split the figure on the right into a rectangle and a triangle. The rectangle has sides 6 inches and 2.5 inches, and the triangle has base 6 inches and height $(6 - 2.5)=3.5$ inches.
Area of rectangle $A_{1}=6\times2.5 = 15$ square inches
Area of triangle $A_{2}=\frac{1}{2}\times6\times3.5=10.5$ square inches
Total area $A=A_{1}+A_{2}=15 + 10.5=25.5$ square inches

Answer:

Perimeter of the figure on the right: 19.5 inches; Area of the figure on the right: 25.5 square inches