In the diagram below, BC is an altitude of ABD. To the nearest whole unit, what is the length of CD?

The length of the CD is approximately equal to 26.
Using the Pythagorean theorem,
The Pythagoras theorem equation exists expressed as, [tex]c^{2} = a^{2} + b^{2}[/tex], where 'c' be the hypotenuse of the right triangle and 'a' and 'b' exists the other two legs.
To find BA:
Where, BA = [tex]$\sqrt{37^{2}+53^{2}}=\sqrt{4178}$[/tex]
Consider BC = x,
To find the length of [tex]$B D: \sqrt{x^{2}+37^{2}}$[/tex]
Since DBA exists in a right triangle,
[tex]$D A^{2}=B D^{2}+B A^{2}$[/tex]
Substitute the values in the above equation, and we get
[tex]$(x+53)^{2}=\sqrt{4178}^{2}+{\sqrt{x^{2}+37^{2}}}^{2}$[/tex]
Expanding the above equation, we get
[tex]$x^{2}+106 x+2809=x^{2}+5547$[/tex]
Simplifying the equation,
106x = 2736
Divide 2736 by 106, and we get
x = 25.8 approximately 26.
Therefore, the length of the CD is approximately equal to 26.
To learn more about the Pythagorean theorem,
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