Q: Do all tryangles have at least 4 angles?

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A rectangle. The opposite sides at least must be equal if all four angles are 90o.

A polygon with 4 sides has 4 angles. All polyhedra have at least 4 vertices so I cannot think of any shape that meets the requirements.

A square has to have all 4 right angles, by definition

Quadrilateral

False because it depends on what type of a 4 sided quadrilateral it as for example a square has 4 right angles whereas rhombus has no corner right angles.

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A rectangle. The opposite sides at least must be equal if all four angles are 90o.

A polygon with 4 sides has 4 angles. All polyhedra have at least 4 vertices so I cannot think of any shape that meets the requirements.

A square has to have all 4 right angles, by definition

Quadrilateral

No. Except for the case of a square (a special case of rhombus), a rhombus will have 2 congruent acute angles, and 2 congruent obtuse angles. The square has 4 right angles. In fact, every quadrilateral will have either all 4 angles equal to right angle (square and rectangle), or will have at least 1 obtuse angle (also at least 1 acute).

Yes. 4 sides 4 angles. All 90%.

False because it depends on what type of a 4 sided quadrilateral it as for example a square has 4 right angles whereas rhombus has no corner right angles.

Yes, trapezoids have four interior angles. However, not all of the angles are equal. There are two acute angles and two obtuse angles in a trapezoid.

4 corners 4 angles Angles add up to 90' All angles are right angles Has 4 lines of symmetry

All 4 angles are 90 degree angles.

Yes, the 4 inside angles are right angles

It is a RECTANGLE