How to find the length of the diagonal of a quadrilateral - ACT Math
Card 0 of 3
In the parallelogram above, 
and 
. What is the length of the diagonal 
?
In the parallelogram above,
In a parallelogram, the two diagonals bisect each other at their centers. Therefore, 
. To find 
, we set them equal to one another and solve.
Plugging this value back into both equations, then adding those values together, gives us our answer of 
.
In a parallelogram, the two diagonals bisect each other at their centers. Therefore,
Plugging this value back into both equations, then adding those values together, gives us our answer of
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A square has a length of 
. What must be the length of the diagonal?
A square has a length of
A square with a length of 
indicates that all sides are 
since a square has 4 equal sides. Use the Pythagorean Theorem to solve for the diagonal.
A square with a length of
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If the rectangle has side lengths of 
and 
, what is the diagonal of the rectangle?
If the rectangle has side lengths of
Use the Pythagorean Theorem to solve for the diagonal.
Use the Pythagorean Theorem to solve for the diagonal.
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