Answer:
90 cm
Step-by-step explanation:
We know that half of QS is x+25 and half of diagonal PR is 2x+5.
We can tell that x+25 = 2x+5 because both of these are sides of an isosceles triangle ORS. Since we know that, we can find out the diagonal QS by finding x.
2x+5 = x+25 => x = 20
Half of diagonal QS = 20 +25
= 45
Then we can double the half of diagonal QS to find out the diagonal QS.
45 x 2 = 90
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