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The equivalent ratio of the heights of three Russian dolls are 1: 1.57: 1.86.
<h3>What is a ratio?</h3>
It is important to note that a ratio demonstrates how many times one number can fit into another number as they contrast two numbers by ordinarily dividing them.
In this case, the heights of the dolls are given in the ratio 7: 11: 13
Based on the information, the ratio will be illustrated thus:
7/7 = 1
11/7 = 1.57
13/7 = 1.86
This illustrates the ratio of the dolls.
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48 it is counting up by odd numbers (3,5,7,9,11, 13
Provided that the triangle looks like this:
A| \ | \ | \ | \ | \ b| \ 20 | \ | \ | \ | \ |_______40\C a B
Then using the the equation to solve for line segment AC (or b on the diagram):
sin(40) = b/20
b = 20 * sin 40
b = segment AC = 12.9 units
