Question

Rectangel abcd is rectangle , if bc=12, cd=9 then find OA

Answer 1

oa=ob= oc= od

bd=ac

then bd=

$\sqrt{ {bc}^{2} } + {cd}^{2}$

bd=

$\sqrt{81 + 144 }$

= 15 then ac=15

oa=ac÷2=7.5