Triangle ABC is an isosceles triangle in which side
AB = AC. What is the perimeter of triangle ABC?

A.5 + units
B.10 + units
C. 10^10 units
D.50 units

Triangle ABC is an isosceles triangle in which side AB AC What is the perimeter of triangle ABC A5 units B10 units C 1010 units D50 units class=

Respuesta :

Answer:

length of AC = 3-(-2) = 5 unit

As AC = AB

AB = 5 unit

BY pythagorus theorem

BC²=3²+1² =10

BC=√10 unit =3.16 unit


perimeter of triangle ABC = AB + AC + BC = 5 + 5 + √10

= 10+√10 unit


The perimeter of the triangle ABC is [tex]10 \ + \ \sqrt{10} \ units[/tex].

The given parameters:

  • Triangle ABC = Isosceles triangle

The length of AC = 3-(-2) = 5 unit

The length of AC = length of BC = 5 unit

The length of BC is calculated by applying Pythagoras theorem as follows;

[tex]BC^2 = (4-1)^2 + (3-2)^2\\\\BC^2 = 3^2 + 1^2\\\\BC^2 = 10\\\\BC = \sqrt{10} \\\\[/tex]

The perimeter of the triangle ABC is calculated as follows;

[tex]P = AB + AC + BC\\\\P = 5 \ + \ 5 \ + \ \sqrt{10} \\\\P = 10 \ + \ \sqrt{10} \ \ units[/tex]

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