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enyata [817]
2 years ago
5

He vertices of ?ABC are A(2, 8), B(16, 2), and C(6, 2). The perimeter of ?ABC is units, and its area is square units.

Mathematics
2 answers:
iogann1982 [59]2 years ago
8 0

Answer:

Note :

The perimeter is :  AB + BC + CA


AB =√((XB - XA)² + (YB - YA)²) = √((16-2)²+(2-8)²) = √(12²+6²) = √(144+36)=√180

AB = √(36×5) = 6√5 units

same method for :  BC ; CA   ..........


katovenus [111]2 years ago
6 0

Answer:

Perimeter = 32.44 unit

Area of triangle = 30 unit²

Step-by-step explanation:

By distance formula distance between (a,b) and (c,d) is \sqrt{(c-a)^2+(d-b)^2}

So, we have

      AB=\sqrt{(16-2)^2+(2-8)^2}=15.23\\\\BC=\sqrt{(16-6)^2+(2-2)^2}=10\\\\AC=\sqrt{(2-6)^2+(8-2)^2}=7.21

Perimeter = 15.23 + 10 + 7.21 = 32.44 unit

We have s=\frac{15.23+10+7.21}{2}=16.22

Area of triangle=\sqrt{s(s-AB)(s-BC)(s-AC)}=\sqrt{16.22(16.22-15.23)(16.22-10)(16.22-7.21)}=30

Area of triangle = 30 unit²

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a. Write the function that represents the value of the account at any time, t.

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