Asked by laxmi.agarwal055 | 21st Feb, 2018, 07:18: PM

Expert Answer:

begin mathsize 16px style In space the space rhombus space PQRS comma space angle straight S equals 60 degree rightwards double arrow angle straight R equals 120 degree
SR equals 10 space cm
SQ squared equals QR squared plus SR squared minus 2 QR cross times SRcos 120 degree
equals 100 plus 100 minus 2 cross times 10 cross times open parentheses fraction numerator negative 1 over denominator 2 end fraction close parentheses
equals 300
end style

Answered by Sneha shidid | 22nd Feb, 2018, 11:43: AM