| Eksempel: | - A square is one type of rectangle, and a rectangle is one type of parallelogram.
- A square is always a rectangle, but a rectangle is not always a square.
- The opposite sides of a rectangle are parallel.
- A square is both a rectangle and a rhombus.
- Important geometric figures, that are triangle, square, rectangle, circle, parallelogram and trapeze.
- The area of a triangle is half of the area of the rectangle with equivalent base and height.
- Some important geometric shapes are the triangle, the square, the rectangle, the circle, the parallelogram and the trapezium.
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