What is the side AB of triangle ABC, if its perimeter is X cm, AC = 10cm, BC = 8 cm

| August 16, 2021 | education

What is the side AB of triangle ABC, if its perimeter is X cm, AC = 10cm, BC = 8 cm, Find the length of the side AB, if X = 25cm write the solution in general form.

By definition, the perimeter of a triangle is equal to the sum of the lengths of all its sides or P = a + b + c (where P is the perimeter, a, b, c are the lengths of its sides).

It turns out that the perimeter of our triangle is P = AB + BC + AC (where P is the perimeter, AB, BC, AC are the lengths of the sides). It turns out that we do not know the side AB, in order to find it we need to from the sum, i.e. P, subtract the known terms, i.e. ВС and АС (in accordance with the rule for finding the unknown term).

P = AB + BC + AC.

AB = P – BC – AC.

at P = x.

AB = X – BC – AC.

at X = 25 cm, BC = 8 cm, AC = 10 cm.

AB = 25 – 8 – 107 (cm).



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.