The diagonal AC, AB = CD, BC = AD is drawn in the quadrangle ABCD.
| September 29, 2021 | education
The diagonal AC, AB = CD, BC = AD is drawn in the quadrangle ABCD. The perimeter of triangle ABC is 161 cm, AD = 40 cm, DC = 45 cm. Find the length of the diagonal AC.
Consider triangle ABC:
PABC = 161 cm;
AB = CD = 45 cm; BC = AD = 40 cm;
AC = 161 – (45 + 40) = 76 cm.
Answer: AC = 76 cm.
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