Find the following ratios.
(i) The ratio of radius to circumference of the circle.
(ii) The ratio of circumference of circle with radius r to its area.
(iii) The ratio of diagonal of a square to its side, if the length of side is 7 cm.
(iv) The lengths of sides of a rectangle are 5 cm and 3.5 cm. Find the ratio of its
perimeter to area.
Answers
Answer:
1
Pi (Ratio of the Circumference of a Circle to Its Diameter) Circles are all similar, and "the circumference divided by the diameter" produces the same value regardless of their radius. This value is the ratio of the circumference of a circle to its diameter and is called π (Pi).
2
2 : r
Thus, the ratio of circumference of circle with radius r to its area is 2 :
3
Side of the square = 7cm
Length of the diagonal of the the square
=
2
* Side of the square
= 7
2
cm
Length of diagonal of the square: Side of the square
= 7
2
cm:7cm
=
7
7
2
=
1
2
=(
2
):1
Thus the ratio of diagonal of the square to its side is
2
:1
4
P=17cm
l Length
5
cm
w Width
3.5
cm
Solution
P=2(l+w)=2·(5+3.5)=17cm
Step-by-step explanation:
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