Category : 7th Class
In this chapter, problems are based on numbers of lines, triangles, quadrilaterals etc. in a complex figure.
To count the number of lines, add all the horizontal, vertical and slanting lines.
To count the number of triangles, add all the number of triangles composed of 1 component, 2 components, 3 components and so on.
The same process is for counting the number of other polygons.
Count the number of squares in the given figure.
(a) 7 (b) 6 (c) 9 (d) 10
The squares composed of two components each are ABCK, CDEL, JKHI, HLFG and KCLH, i.e. 5 in number.
The squares composed of four components each are ACHJ and CEFH, i.e. 2 in number.
Total number of squares in the figure =5+2=7.
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