Exercise
6.3
1)
How many Triangles are there in each of the following figures?
Answer: (i) 12 triangles (ii) 16 triangles (iii) 32 triangles
(iv) 35 triangles
2)
Find the number of dots in the tenth figure of the following patterns.
(i) Answer: 21, 28, 36, 45, 55 Tenth
figure 55 dots.
(ii) Answer: 36, 49, 64, 81, 100 Tenth
figure 100 dots.
3)
(i)
Draw the next pattern.
Answer:
(ii)
Prepare a table for the number of dots used for each pattern.
Answer:
(iii)
Explain the pattern.
Answer: 2 ; 2 + 3, 5 + 4; 9 + 5
(iv)
Find the number of dots in the 25th pattern.
Answer: 1 + 2 + 3 + 4 + .... + 26 = 350
4)
Count the number of squares in each of the following figures?
Answer: (i) 20 squares (ii) 10 squares
5)
How many Circles are there in the following figure?
Answer: 7 Circles
6)
Find the minimum number of straight lines used in forming the following figures.
Answer: (i) 10 lines (ii) 12 lines.
Answers:
Exercise 6.3
(1) (i) 12 triangles (ii) 16 triangles (iii) 32 triangles (iv)
35 triangles
(2) (i) 55 (ii) 100
(3) (i)
(ii)
(iii)
(iv) 350
(4) (i) 20 squares (ii) 10 squares
(5) 7 circles
(6) (i) 10 (ii) 12
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