Question

please help
subject - information technology (IT) computer ​

Answer 1

Explanation:

can u properly tell that what do u want know?

Answer 2

Answer:

Answer:

Given :

The sides of a triangle are 25 cm, 56 cm and 39 cm.

To Find :-

What is the semi-perimeter of a triangle.

Solution :-

Given :

First Side (a) = 25 cm

Second Side (b) = 56 cm

Third Side (c) = 39 cm

According to the question by using the formula we get,

\begin{gathered}\footnotesize \implies \sf\boxed{\bold{Semi-Perimeter_{(Triangle)}\: (s) =\: \dfrac{Sum\: of\: all\: Sides}{2}}}\\\end{gathered}

⟹

Semi−Perimeter

(Triangle)

(s)=

2

SumofallSides

\begin{gathered}\small \implies \sf\bold{Semi-Perimeter_{(Triangle)}\: (s) =\: \dfrac{a + b + c}{2}}\\\end{gathered}

⟹Semi−Perimeter

(Triangle)

(s)=

2

a+b+c

\begin{gathered}\small \implies \sf Semi-Perimeter_{(Triangle)}\: (s) =\: \dfrac{25 + 56 + 39}{2}\\\end{gathered}

⟹Semi−Perimeter

(Triangle)

(s)=

2

25+56+39

\begin{gathered}\small \implies \sf Semi-Perimeter_{(Triangle)}\: (s) =\: \dfrac{81 + 39}{2}\\\end{gathered}

⟹Semi−Perimeter

(Triangle)

(s)=

2

81+39

\begin{gathered}\small \implies \sf Semi-Perimeter_{(Triangle)}\: (s) =\: \dfrac{\cancel{120}}{\cancel{2}}\\\end{gathered}

⟹Semi−Perimeter

(Triangle)

(s)=

2

120

\begin{gathered}\small \implies \sf Semi-Perimeter_{(Triangle)}\: (s) =\: \dfrac{60}{1}\\\end{gathered}

⟹Semi−Perimeter

(Triangle)

(s)=

1

60

\begin{gathered}\small \implies \sf\bold{\underline{Semi-Perimeter_{(Triangle)}\: (s) =\: 60\: cm}}\\\end{gathered}

⟹

Semi−Perimeter

(Triangle)

(s)=60cm

Personal pronouns are used to replace people, places or things to make sentences shorter and clearer. Examples of personal pronouns include: I, we, it, they, you, and she. Your choice of personal pronoun will determine if you are writing in the first person or the third person.

\therefore∴ The semi-perimeter of a triangle is 60 cm .