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Subpunctul c, va rog

Subpunctul C Va Rog class=

Răspuns :

[tex]\it \mathcal{V}_{DACD'}= \dfrac{\mathcal{A}_b\cdot h}{3} = \dfrac{\mathcal{A}_{DAC}\cdot DD'}{3}=\dfrac{\dfrac{\mathcal{A}_{ABCD}}{2}\cdot20}{3} = \dfrac{400\cdot10}{3}=\dfrac{4000}{3}\ cm^3[/tex]