Asked in Math and Arithmetic
How do I find a missing diagonal in a rhombus?
June 14, 2015 12:19PM
A rhombus has 2 diagonals and they are a straight lines drawn opposite to its interior corners intersecting each other at right angles.
June 14, 2015 8:51AM
The answer depends on what information you do have about the
rhombus. Assuming that you know the length of the sides and one of
the diagonals, then,
- In the triangle formed by the given diagonal and the sides of
the rhombus, you know all three sides. So you can use the cosine
rule to calculate the angle between the sides of the
- The other pair of angles in the rhombus are its
- So now you know two sides and the included angle of the
triangle formed by the missing diagonal and the sides of the
- You can use the cosine rule again to find the missing diagonal.