ACT Preparation / Unit 13 ACT 1217 short lesson, about 20 seconds
Rectangles, Rhombuses, Squares and Trapezoids
Captions available
The idea
A rectangle is a parallelogram with right angles and equal diagonals. A rhombus has four equal sides and perpendicular diagonals. A square is both. A trapezoid has two and only two parallel sides.
In practice
A square's diagonals are equal and perpendicular.
Where people slip
Every square is a rectangle and a rhombus; not every rectangle is a square.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
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