Question

Following are some figures: Classify each of these figures on the basis of the following:

(i) Simple curve

(ii) Simple closed curve

(iii) Polygon

(iv) Convex polygon

(v) Concave polygon

(vi) Not a curve

Answer 1

(i) Simple curve

Fig (i), (ii), (v), (vi) and (vii) are simple curves.

(ii) Simple closed curve

Fig (i), (ii), (v), (vi) and (vii) are simple closed curves.

(iii) Polygon

Fig (i) and (ii) are polygons. Polygons are minimum three sided enclosed figure.

(iv) Convex polygon

Fig (ii) is a convex polygon. In a convex polygon all the vertices are pointing outwards.

(v) Concave polygon

Fig (i) is a concave polygon. In a concave polygon all the vertices are not pointing outwards.

(vi) Not a curve

Fig (viii) is not a curve.