Calculate the area of the shaded region in the given figure ( take : root 105 = 10.25 )

Dear Student,
For bigger triangle with sides 122,120 and 22 units, semiperimeter=264/2=132 units
Thus using Heron's Formula, area is given by $$\begin{gathered} \sqrt{132(132-122)(132-120)(132-22)} \\ i.e \sqrt{132*10*12*110} \\ i.e \sqrt{12*11*10*12*11*10} \\ i.e 12*11*10=1320 sq units \end{gathered}$$
For smaller (white) triangle with sides 24,26 and 22 units, semiperimeter= 72/2=36 units
Thus, using Heron's Formula, area is given by$$\begin{gathered} \sqrt{36(36-26)(36-24)(36-22)} \\ i.e \sqrt{36*10*12*14} \\ i.e\sqrt{6*6*2*5*2*6*2*7} \\ i.e 6*2*\sqrt{5*6*2*7} \\ i.e 12*\sqrt{5*2*3*2*7} \\ i.e 12*2*\sqrt{105} \\ i.e 24*10.25 \\ i.e 246 sq units \end{gathered}$$
Thus, shaded portion would be difference of areas, i.e 1320-246=1074 sq units
Regards.