Ask.
Find the area of quadrilateral ABCD. (Hint: the diagonal divides the quadrilateral into two triangles.]
А
7.84
4.57
3.42
horas
D
4.39
С
A. 14.89 units
B. 11.09 units
C. 17.46 units
D. 18.22 units?

Ask Find the area of quadrilateral ABCD Hint the diagonal divides the quadrilateral into two triangles А 784 457 342 horas D 439 С A 1489 units B 1109 units C 1 class=

Respuesta :

Answer:

[tex]A) 14.89~ units[/tex]

Step-by-step explanation:

[tex]AD=C=3.42~, AC=d=4.57, ~CD=a=4.39[/tex]

[tex]S=\frac{C+d+a}{2} =\frac{3.42+4.57+4.39}{2} =6.19[/tex]

[tex]Using ~ heron's~ formula:[/tex]

[tex]Area~ of ADC~is:[/tex]

⇒ [tex]\sqrt{s(s-c)(s-d)(s-a)}[/tex]

⇒ [tex]\sqrt{6.19(6.19-3.42)(6.19-4.57)(6.19-4.39)}[/tex]

⇒ [tex]\sqrt{6.19*2.77*1.62*1.8}[/tex]

⇒ [tex]\sqrt{49.9986}[/tex] ⇒ [tex]7.071[/tex]

[tex]Area ~of ~ ABD ~is:[/tex]

⇒ [tex]\sqrt{s(s-d)(s-b)(s-a)}[/tex]

⇒ [tex]\sqrt{8.35(8.35-7.84)(8.35-3.42)(8.35-5.44)}[/tex]

⇒ [tex]\sqrt{8.35*0.51*4.93*2.91}[/tex]

⇒ [tex]\sqrt{61.0937}[/tex] ⇒ [tex]7.816[/tex]

[tex]So, Area ~ of ~quadrilateral~ ABCD ~ =[/tex]

[tex]A=Area ~of ~ADC+Area ~ of ABD:[/tex]

[tex]A=7.071+7.816[/tex]

[tex]A=14.89 ~units^2[/tex]

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