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How many right angles does a hectagon have?
None, because there is no such shape. There is a heptagon (7 sides) or an octagon (8 sides), and the answers will be different depending on what you meant. In their convex form, either can have at most 3 right angles. But a concave heptagon can have any number up to 6 right angles. A concave octagon can have up to 7 interior right angles. It can, in fact have all eight if reflex right angles (270 deg) are allowed.
How many different types of pentagons are there?
It depends on how they are classified. They can have 1 to 4 acute angles, they can have 1 to 4 right angles, they can have 1 to 5 obtuse angles. The individual values of the angles will generate different pentagons. They can be regular or irregular. They can be convex or concave.
Is an acute angle a concave or convex angle?
All angles < 180 degrees are concave. An acute angle is < 90 degrees. So, all acute angles are concave.
How many angles and how many right angles in a square?
4 right angles, no other angles.
What shape has 3 right angles and 1 obtuse angle and 1 acute angle?
There is no polygonal shape which has exactly those angles. It is possible for a concave polygon with 6 or more vertices to have the given angles.
