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What else can I help you with?
Can a heptagon be parallel and concave?
No, a heptagon cannot be parallel but two heptagons can.A heptagon can be concave.
How many right angles does a concave have?
Depends on a concave what. There can be infinitely many right angles in concave shape that keeps going in and out before returning to its starting point.
How many parallel lines does a concave have?
A concave is not a shape. It is a characteristic of one. It is like asking how many parallel lines a small has.
Are angles parallel?
Angles cannot be parallel.
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.
Is a trapezoid concave?
No. A trapezoid has two parallel sides. This is not possible in a concave quadrilateral.
Are all angles parallel?
No, not all angles are parallel.
Are 2 pair of parallel sides and opposite angle are congruent?
The angles between the sides that are parallel are congruent.The angles between the sides that are parallel are congruent.The angles between the sides that are parallel are congruent.The angles between the sides that are parallel are congruent.
Can a triangle have two parallel angles?
In two dimensions, lines can be parallel, angles cannot. So no plane shape has parallel angles.
Are alternate angles parallel?
Probably not. There's no such thing as angles that are parallel.
When rays parallel to the principal axis of a concave mirror are reflected the pass though?
When rays parallel to the principal axis of a concave mirror are reflected, they converge at the focal point.
Is a hexagon a convex figure?
It depends on what the angles are. If any of the angles have measurements greater than 180 degrees, it is concave. If all angles are less than 180 degrees, then it is concave. For example, a regular hexagon has six 120 degree angles, so it is convex. If there was a hexagon with five 90 degree angles and one 270 degree angle, it would be concave.
