Question

(ii) The diagonals of a rhombus are at right
angles.​

Answer 1

Diagonals of a rhombus-

In any rhombus, the diagonals (lines linking opposite corners) bisect each other at right angles (90°). That is, each diagonal cuts the other into two equal parts, and the angle where they cross is always 90 degrees.

Hope it helps you ❣️☑️☑️☑️

Answer 2

Step-by-step explanation:

in triangle AOD and COD

OA=OC( diagonal of parallelogram bisect each other)

OD=OD( common)

AD=CD

triangle AOD =~ COD

by sss rule

2<AOD =180° ( linear pair)

<AOD=90°

similarly se can prove that <COD ,<BOC,<AOB=90°

H.P