Rectangle: A quadrilateral with four right angles. Each angle measures exactly 90 degrees, ensuring the shape has four corners that are all right angles.
Quadrilateral: A polygon with four sides. A rectangle is a specific type of quadrilateral distinguished by its right angles and side properties.
Opposite sides: Sides that are across from each other in a polygon. In a rectangle, the opposite sides are equal in length and parallel.
Parallel sides: Sides that are always the same distance apart and never meet, no matter how far they extend. In a rectangle, the pairs of opposite sides are parallel.
A rectangle has four right angles, each measuring 90 degrees. This means all four corners are perfect right angles, giving the shape its characteristic appearance.
Opposite sides of a rectangle are equal in length, meaning the side across from each other are the same size.
The opposite sides of a rectangle are parallel to each other, which means they run in the same direction and will never intersect.
The perimeter of a rectangle can be calculated by adding twice the length and twice the width, or equivalently, by the formula: perimeter = 2 × (length + width).
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?
3. How can you determine if a rectangle will fit into a space that measures 10 meters in length and 4 meters in width?
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.
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