David Weber, Talei Kunkel, Harriet Simand and, Justin Medved Solutions for Chapter: Perimeter, Area and Volume Environmental Impacts, Exercise 12: Practice 2

Find the perimeter and area of the below compound shape. 
All measurements are in centimeters.

Find the perimeter and area of the below compound shape. 
All measurements are in centimeters.

Calculate the area of orange region. All measurements are in millimeters.

Calculate the area of the orange region. All measurements are in millimeters.

Calculate the area of the orange region. All measurements are in millimeters.

Calculate the area of the colour region. All measurements are in millimetres.

Clear-cutting is a practice used in the logging and forestry industries where all the trees in a specific area are cut down. The damage can be vast, and often an areal photo, like this one, can emphasize the scale of the deforestation.
Suppose a rectangular forest measuring $10$ km by $15$ km has a section of it clear-cut. The clear-cut section is a rectangle measuring $5$ km by $6$ km.
Find the area of the forest that is still intact.

Clear-cutting is a practice used in the logging and forestry industries where all the trees in a specific area are cut down. The damage can be vast, and often an areal photo, like this one, can emphasize the scale of the deforestation.
Suppose a rectangular forest measuring $10$ km by $15$ km has a section of it clear-cut. The clear-cut section is a rectangle measuring $5$ km by $6$ km.
What percentage of the original forest was cut.