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find the area and perimeter of the triangle. PLEASEE HELP ME THANK YOUUU

Find The Area And Perimeter Of The Triangle PLEASEE HELP ME THANK YOUUU class=

Sagot :

devishri1977

Answer:

Step-by-step explanation:

F(-4,-3)  ; E (4 , -3)

distance of EF = 4+4 = 8 units

h = 6 units

b = EF = 8 units

[tex]Area = \dfrac{1}{2}*b*h\\\\= \dfrac{1}{2}*8*6\\\\= 4*6\\\\= 24 \ sq.units[/tex]

F(-4,-3) ; D(1,3)

[tex]FD = \sqrt{(x_{2}-x_{1})^{2}+(y_{2}-y_{1})^{2}}\\\\=\sqrt{-1-[-4])^{2}+(3-[-3])^{2}}\\\\=\sqrt{-1+4)^{2}+(3+3)^{2}}\\\\=\sqrt{3^{2}+6^{2}}\\\\=\sqrt{9+36}\\\\=\sqrt{45}\\\\=6.7 units\\\\[/tex]

D(1 , 3) ; E(4,-3)

[tex]ED = \sqrt{(4-1)^{2}+(-3-3)^{2}}\\\\\sqrt{3^{2}+(-6)^{2}}\\\\=\sqrt{9+36}\\\\=\sqrt{45}\\\\=6.7[/tex]

Perimeter = FD + ED + EF

                 = 6.7 +6.7 + 8

                  = 21.4 units

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