The answer is 35cm 2. To find the area, you need to divide the shape into a rectangle and a triangle: The area of the rectangle is 5 Ã 4 = 20cm 2. The base of the triangle is calculated by subtracting the base of the rectangle (4cm) from the total length of the shape (10cm).
A handful of studies have found that when wounds are kept moist and covered, blood vessels regenerate faster and the number of cells that cause inflammation drop more rapidly than they do in wounds allowed to air out. It is best to keep a wound moist and covered for at least five days.
Step 3. Cover your scratches with a bandage only if they're on an area of the body that is susceptible to dirt or friction. Scratches heal well when exposed to open air, unless your clothing constantly rubs at the area and peels away the new skin healing over the scratch.tep 3. Cover your scratches with a bandage only if they're on an area of the body that is susceptible to dirt or friction. Scratches heal well when exposed to open air, unless your clothing constantly rubs at the area and peels away the new skin healing over the scratch.