81 mm
Chat with our AI personalities
To find the area of a triangle find the base and the height of the triangle. Then multiply the base by the height, then divide by 2. To find the perimiter of a triangle add together the outside edge of the triangle. To find the area of a triangle find the base and the height of the triangle. Then multiply the base by the height, then divide by 2. To find the perimiter of a triangle add together the outside edge of the triangle.
Add the four sides.
hteht
The perimeter of a shape such as a polygon is the sum of its sides.
4 sides so 20x + 8