Question

explain about simple curves, simple closed curves, concave quadrilateral, convex quadrilateral, and concave ,convex polygons​

Answer 1

Answer:

Simple closed curve -In simple closed curves the shapes are closed by line-segments or by a curved line. (c) Polygon-A simple closed curve made up of only line segments is called a polygon. ... (e) Concave polygon- A concave polygon is defined as a polygon with one or more interior angles greater than 180∘. 180 ∘ .

Answer 2

SIMPLE CURVES-

a simple curve is a curve that does not cross itself.

SIMPLE CLOSED CURVE-

are connected curve that does not cross itself an end at the same point where it begins for example circles and polygons.

CONCAVE QUADRILATERAL-

concave quadrilateral is a four sided polygon that have one interior angle that exceeds 180 degrees. And the another means of determining if a quadrilateral is concave, is to check the diagonal of the line segment that connects non-adjacent vertices.

CONVEX QUADRILATERAL-

convex quadrilateral is a four sided polygon that have interior angle that measure less than 180 degrees each. t

The diagonals are contained entirely inside of these quadrilateral's. Convex quadrilaterals can also be classified into several sub-categories based on the sides and angles.

CONCAVE POLYGONS-

a concave polygon has at least one angle that measures more than 180 degree which is called a concave polygon the vertices or the endpoints of these polygons are inwards as well as outwards. They are just opposite of the convex polygons. A triangle cannot be considered as a concave polygon because it has only three sides and whose sum of interior angles is 180 degree.

CONVEX POLYGONS-

The measures of interior angle in convex polygon are strictly less than 180 degrees. Convex polygon are the exact inverse concave polygons. The vertices of the convex polygon always point outwards.

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