In general, trapezoids do not have right angles. In fact, a trapezoid with a right angle is a special case, called a rectangle.
Each angle of a rectangle is a right angle. (90°)
Except for the special case of a rectangle, a parallelogram must have two acute angles.
A rectangle is a quadrilateral with 4 sides and 4 right angles. A square is a special form of rectangle, and it meets that criterion. But it is also equilateral, meaning its sides are all the same length (are all equal). It is a rectangle or a square. A square is a special type of rectangle with all sides having equal length. Here is a a nice chart showing the quadralaterals. http://content.answers.com/main/content/wp/en/f/f1/Quadrilateral_hierarchy.pngA quadrilateral where each angle is a right angle is known as an oblong.
A rectangle is defined as "a parallelogram with one right angle" A parallelogram is defined as "a quadrilateral with opposite sides equal and parallel" This makes a rectangle a sort of second-generation quadrilateral!
A parallelogram with a right angle is a rectangle.
Yes, a rectangle is a special kind of parallelogram - one that has a right angle. (You can prove that if it has one right angle all angles are right.)
A rectangle is not an angle.
In general, trapezoids do not have right angles. In fact, a trapezoid with a right angle is a special case, called a rectangle.
Each angle of a rectangle is a right angle. (90°)
Yes (or its special case, a square).
Except for the special case of a rectangle, a parallelogram must have two acute angles.
No, a rectangle cannot have an obtuse angle. By definition, a rectangle is a quadrilateral with four right angles (90-degree angles). An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees. Therefore, in a rectangle, all angles must be right angles, making it impossible for an obtuse angle to exist within a rectangle.
A rectangle is a quadrilateral with 4 sides and 4 right angles. A square is a special form of rectangle, and it meets that criterion. But it is also equilateral, meaning its sides are all the same length (are all equal). It is a rectangle or a square. A square is a special type of rectangle with all sides having equal length. Here is a a nice chart showing the quadralaterals. http://content.answers.com/main/content/wp/en/f/f1/Quadrilateral_hierarchy.pngA quadrilateral where each angle is a right angle is known as an oblong.
A rectangle is defined as "a parallelogram with one right angle" A parallelogram is defined as "a quadrilateral with opposite sides equal and parallel" This makes a rectangle a sort of second-generation quadrilateral!
A square is a special rectangle.
Dihedral angle