Question

plz help me in solving all these questions . ​

Answer 1

Step-by-step explanation:

$\huge16$

${\bold { \orange{\boxed{area \: of \: shaded \: region \: = area \: of \: triangle \: - \: smaller \: triangle}}}}$

Using Heron's formula

$\bold{area \: of \: triangle \: = \sqrt{s(s - a)(s - b)(s - c)} }$

where s = a+b+c/2

s = 120+122+22/2

s = 78

$\sqrt{78(78 - 120)(78 - 122)(78 - 22) } \\ \\ \sqrt{78(42)(44)(56)}$

$= > \: 2841.137cm {}^{3}$

Area of smaller triangle :

s = 24+26+22/2

s = 72/2

s = 36

$\sqrt{36(36 - 24)(36 - 26)(36 - 22)} \\ \\ \sqrt{36(12)(10)(14)}$

$245.926 {cm}^{3}$

area of shaded region would be = 2841.137 - 245.926 = 2595.211cm^3

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