Question

R²=18.51²+（R-7.23）²,

Answer 1

R²＝18.51²+(R-7.23)²

[R+(R-7.23)][R-(R-7.23)]＝18.51²

7.23(2R-7.23)＝18.51²

2R-7.23＝47.3887

2R＝54.6187

R＝27.3093