Question

two adjacent sides of a parallelogram are 10 cm and 12cm .if its one digonal is 14 cm long fond the area of 5he parallelogram.​

Answer 1

Step-by-step explanation:

Area of parallelogram ABCD=2×area△BCD

Now, in △BCD

S=212+10+4=18cm

ar△BCD=s(s−a)(s−b)(s−c)=18(18−12)(18−10)(18−14)

                    =18×6×8×4=3×6×6×2×4×4

                    =4×66=24root6cm2

∴ area of parallelogramABCD=2×246=48root6cm2