FTCE Professional Education Practice Exam

Which shape is specifically defined as a parallelogram with one right angle?

1. Rectangle

2. Rhombus

3. Trapezoid

4. Square

The correct answer is: Rectangle

A rectangle is specifically defined as a type of parallelogram that has four right angles. In addition to having one right angle, the other angles also measure 90 degrees because opposite angles in a parallelogram are equal. This means that if one angle is a right angle, all other angles must also be right angles, confirming that a rectangle is indeed a special case of a parallelogram. The other options present different shapes with distinct properties. A rhombus has four equal sides but does not require right angles; it can have angles that are not 90 degrees. A trapezoid is defined by having at least one pair of parallel sides and does not conform to the definition of a parallelogram. A square is both a rectangle and a rhombus since it has equal sides and four right angles, but the specific requirement of just one right angle leads us back to the broader category of rectangles. Thus, the answer aligns perfectly with the definition of a rectangle in geometry.