R^2=(R⼀2)^2+3^2 怎么解

2025-06-27 15:37:39
推荐回答(1个)
回答1:

R^2=(R/2)^2+3^2
R^2-(R/2)^2=3^2
(3R^2)/4=3^2
R^2=3*2^2
R=±2√3
若R是半径,则取正值R=2√3