Rectangle — definition?
Quadrilateral with four right angles.
Angles in a rectangle — measure?
All four are 90 degrees.
Opposite sides — equal?
Yes, they are equal and parallel.
Rectangle symmetry — lines?
Vertical and horizontal axes.
Sides — congruent pairs?
Opposite sides are congruent.
Interior angle sum?
360 degrees.
Adjacent angles — sum?
Add up to 180 degrees.
Perimeter formula?
2 × (length + width).
Test your knowledge with 4 questions on Mastering Rectangle Properties.
1. How does the number of lines of symmetry in a rectangle compare to the number of lines of symmetry in a circle?
2. What is a key property of all angles in a rectangle?
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