Question

Rapid, dacă se poate....​

Answer 1

AE = mediana => AE = BC/2 = 8/2 = 4 cm

cos(DAE) = AD/AE

√3/2 = AD/4 => AD = 4√3/2 = 2√3 cm

ED = √AE² - AD² = √16 - 12 = √4 = 2 cm => DB = 2 cm

AB = √AD² + DB² = √16 + 4 = √20 = 2√5 cm

AC = √BC² - AB² = √64 - 20 = √44 = 2√11 cm

P = AB + AC + BC = 8 + 2√5 + 2√11 cm

Answer 2

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