Question

please answer my destination it is from my exams in I am in class seven so please send the answer according to class 7 child.​

Answer 1

Step-by-step explanation:

First we will have to find the side of the rhombus-

In traingle BOC,

BO=21cm

OC=20cm

By using pythagoras theorem,

BC²=BO²+OC²

BC²=21²+20²

BC²=441+400

BC²=841cm

BC=√841

BC=29cm

Perimeter of rhombus-

=4a(where a is the side)

=4*29

=116cm²

hope it helps......