Radha is drawing a dot Rangoli (a beautiful pattern of lines joining dots) with chalk powder. She has 9 dots in a row. How many dots will her Rangoli have for r rows? How many dots are there if there are 8 rows? If there are 10 rows?
Answers
Answer:
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Answer:
The number of dots for each row is x=9
.
We know the equation to find the number of dots in the Rangoli for r rows is,
x×r
On Substituting the values in the above equation, we get the value as,
9r
Therefore, the number of dots in r rows are 9r dots.
We also know the equation to find the number of dots in a 8 row Rangoli is,
8×x
Substituting the values in the above equation, we get the value of the number of dots for 8 rows.
8×x=8×9=72
Therefore, the number of dots in 8 rows are 72 dots.
We also know the equation to find the number of dots in 10 row Rangoli is,
10×x
On Substituting the values in the above equation, we get the value of number of dots for 10 rows
10×x=10×9=90
Therefore, the number of dots in 10 rows is 90 dots.
Therefore, the number of dots in r rows are 9r dots, the number of dots in 8 rows are 72 dots and the number of dots in 10 rows are 90 dots.