Question

in a cyclic a quadrilateral the opposite angles are supplementary proof this theorem

Answer 1

let the diagonals be like AC=16 and BD=12 .
o is the center
AO=8 and DO=6 
use the PYTHAGORUS  therome to find AD 
so AD will be 10
and perimeter is 4a 
that is 4(10)
perimeter=400cm sqare