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| 1. |
. Area of a rhombus with diagonals 12cm and 7 cm is ______ sq.cm * |
| Answer» B are LENGTH of DIAGONAL thenLet a & b are length of diagonal thena+b=12 ________ (1) (Given)Let a & b are length of diagonal thena+b=12 ________ (1) (Given)perimeter of diagonal =2 −8a−4a+32=0 −8a−4a+32=0a(a−8)−4(a−8)=0 −8a−4a+32=0a(a−8)−4(a−8)=0(a−4)(a−8)=0 −8a−4a+32=0a(a−8)−4(a−8)=0(a−4)(a−8)=0[a=4 or a=8] −8a−4a+32=0a(a−8)−4(a−8)=0(a−4)(a−8)=0[a=4 or a=8]from EQUATION (1) [b=8 or 4] −8a−4a+32=0a(a−8)−4(a−8)=0(a−4)(a−8)=0[a=4 or a=8]from equation (1) [b=8 or 4]∴ length of diagonals are 4 cm and | |