Question

Найти длину х на рисунке 42

Answer 1

A)
cd = √(12²-5²) = √119
x = √(cd²+db²) = √(119+256) = 5√15
b)
ab = √(2²+3²) = √13
x = √(ab²+bd²) = √(13+36) = √49 = 7
c)
ac = √(8²-6²) = 2√7
x = √(ac²-dc²) = √(28-21) = √7