lovelexii9361 lovelexii9361 20-05-2023 Mathematics contestada An acute triangle has side lengths 21 cm, x cm, and 2x cm. If 21 is one of the shorter sides of the triangle, what is the greatest possible length of the longest side, rounded to the nearest tenth? 18. 8 cm 24. 2 cm 42. 0 cm 72. 7 cm.