Mathematics for IGCSE & O level - Geometrical Terms (Section 3 - No. 28)
Which statements are true about a square?
All sides are equal
Opposite sides are parallel
Diagonals bisect each other at right angles
All angles are obtuse
説明
A square has equal sides, parallel opposite sides, and diagonals that bisect each other at right angles. Its angles are right angles, not obtuse.