create a 2D shape with all but one right angles

A 2D shape that has all but one right angle is called a **trapezoid** (or **trapezium** in some regions). Specifically, this shape has at least one pair of parallel sides, and only one of its angles is not a right angle, while the others are 90°.

To describe it clearly:

- The trapezoid has two parallel sides.
- Three of the angles are right angles (90°).
- One of the angles is not a right angle (can be less than or greater than 90°).

Would you like to see a drawing of this shape?

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Here are five related questions to expand on this topic:
1. What is the difference between a trapezoid and a parallelogram?
2. How do you calculate the area of a trapezoid?
3. What types of quadrilaterals always have right angles?
4. Can a trapezoid be classified as a rectangle? Why or why not?
5. How does the length of the parallel sides affect the trapezoid's properties?

**Tip:** To calculate the area of a trapezoid, you need the lengths of the parallel sides and the height.

Discover the properties of a trapezoid, a 2D quadrilateral with three right angles and one angle that isn't 90 degrees. Learn key geometric concepts such as the formula to calculate the area and explore the angle properties of trapezoids. Suitable for students in Grades 5-7.

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