Rectangle: length x width
triangle: (base x height)/2
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It is not possible to provide any kind of answer without information on the relationship - if any - between the triangle and the rectangle.
Yes because the area of a rectangle is base times height and every triangle is half a square.
Yes. Any triangle can be fitted twice into a rectangle having the same base length and vertical height as the triangle. Consequently, whilst the area of a rectangle = length x width ; the area of a triangle = 1/2 base x height. If we were using the same words this would be 1/2 length x width.
Area circle: π × radius² Area triangle: ½ × base × height Area Parallelogram: base × height Area: Rectangle: length × width In a triangle, the base is any side between two vertices and the height is the perpendicular distance from this side to the third vertex. In a parallelogram the base is any side. The height is the perpendicular distance between this side and the side parallel to it.
As written, that's confusing. The length and width of a triangle wouldn't have any bearing on the perimeter and area of a rectangle unless they overlap in some drawing that only you are looking at. Let's assume you meant rectangle all along. If the dimensions of a rectangle increased 4 times the perimeter would also increase 4 times. The area would increase 16 times. Try it out. A 2 x 3 rectangle has perimeter 10 and area 6. An 8 x 12 rectangle has perimeter 40 and area 96.