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If you are referring to the area of a rectangle, it will increase by 3 times the width. The area of a triangle will increase by 3 times 1/2 the base or, in other words, 1 1/2 times the base. (This answer presumes you mean the height increases by three units, such as inches or millimeters, not by three times the original height.)
1/2 times the perimeter of the base times slant height
The base is one third of the perimeter, half of the base times the height is the area.
Some times you do. If you know all of the side lengths, then you can just add them to find the perimeter, if one of the sides is the same as the height, then you may need to find it.
The perimeter of a trapezoid is the sum of its bases and legs. The area of a trapezoid is the height times (base 1 + base 2) divided by 2
If you are referring to the area of a rectangle, it will increase by 3 times the width. The area of a triangle will increase by 3 times 1/2 the base or, in other words, 1 1/2 times the base. (This answer presumes you mean the height increases by three units, such as inches or millimeters, not by three times the original height.)
Area equals base times height. The perimeter is 4 times the length of one side.
2 times the length plus 2 times the height
The perimeter has nothing to do with the area you have to times the width times height times length and that will give you the area of the shape
base times height minus half of the perimiter base times height minus half of the perimiter
Total surface area= 1/2 times the perimeter of the base times the slant height plus the area of the base Lateral surface area= 1/2 times the perimeter times the slant height
1/2 times the perimeter of the base times slant height
12 the base times the height
12 the base times the height
The base is one third of the perimeter, half of the base times the height is the area.
The perimeter is 2 times the length plus 2 times the width.
Some times you do. If you know all of the side lengths, then you can just add them to find the perimeter, if one of the sides is the same as the height, then you may need to find it.