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1.

Try to construct triangles usingmatch sticks. Some are shown here.Can you make a triangle with(a) 3 matchsticks?(b) 4 matchsticks?(c) 5 matchsticks?(d) 6 matchsticks?(Remember you have to use all theavailable matchsticks in each case)Name the type of triangle in each case.If you cannot make a triangle, think of reasons for it

Answer» a)Yes, it is possible to make a triangle of 3 matches, this is a equilateral triangle.
b)no, it is not possible to make a triangle of 4 matches, because it is not possible.
c)Yes, it is possible to make a triangle of 5 matches, this is a isosceles triangle.
d)Yes, it is possible to make a triangle of 6 matches, this is a equilateral triangle.
Discussion
2.

Which direction will you face if you start facing (a) east and make `1/2` of a revolution clockwise? (b) east and make `(1) 1/2` of a revolution clockwise? (c) west and make `3/4` of a revolution anti-clockwise? (d) south and make one full revolution? (Should we specify clockwise or anti-clockwise for this last question? Why not?)

Answer» (a) west
(b) west
(c) north
(d) south
answer
Discussion
3.

Where will the hour hand of a clock stop if it starts(a) from 6 and turns through 1 right angle?(b) from 8 and turns through 2 right angles?(c) from 10 and turns through 3 right angles?(d) from 7 and turns through 2 straight angles?

Answer» a)6+3=9
b)8+6=14=12+2=2
c)10+9=19=12+7=7
d)7+12=19=12+7=7.
Discussion