Question
The length of diagonal JL is ______.
- 9
- 5
- 6
- 11
The correct answer is: 6
we are given with different parameters and asked to find the length of diagonal JL
In a square, the diagonals bisect each other.
JN = NK = LN = NM
⇒3k - 12 = 8 - k
⇒4k = 20
⇒k = 5
Length of diagonal JL = 2 × JN
= 2×(3 × 5 - 12)
= 2×3
= 6
Therefore we use the property of square to find the value of diagonal JL is 6
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