Work in pairs. Imagine you are at a summer camp. Use - вопрос №2990285 от AlCapone025 05.08.2021 01:52

Question

Другие предметы: Work in pairs. Imagine you are at a summer camp. Use questions from Ex. 2 to find out about your partner. Record yourselves.

AlCapone025 · Answer

Основание AC=10, значит боковые стороны = 40-10/2=15см
BE=EC=1/2 BС=7,5
по теореме пиф находим AE
AE=7.5^2+10^2=12.5
P AEC= 7.5+10+12.5=30
ответ: 30