Question

please answer this if ypu know only​

Answer 1

Solution

Given :-

• Two equal side of an isosceles triangle are 6 m less than the third side .
• perimeter of isosceles triangle = 45 m

Find :-

• Length of its sides

Explanation

We Know,

In ∆ABC isosceles triangle ,

• It have two equal side and a different base .

Let,

According to question

• Base of isosceles triangle = x m
• Two equal side of triangle be = (x - 6 )m

Using Formula

$\dag\boxed{\underline{\tt{\blue{\: Perimeter_{isosceles\: triangle}\:=\:(2a+b)}}}}$

Here,

• 2a = 2(x - 6)
• b = x

So, keep all above Values

==> perimeter of isosceles triangle = 2x - 12 + x

==> 45 = 3x - 12

==> 3x = 45 + 12

==> 3x = 57

==> x = 57/3

==> x = 19

Hence

• Base will be of isosceles triangle = 19m
• Two equal side of isosceles triangle will be = (x - 6) = (19 - 6) = (19 - 6) = 13m

_________________

Answer 2

Given:- Two equal sides of an isosceles triangle are 6 m less than the third side. The perimeter of the triangle is 45 m.

To find:- Length of its sides.

⠀⠀⠀━━━━━━━━━━━━━━━━━━━━━━

⠀

$\sf{\underline{According\: to\: the\: question}}$

⠀

$\bf{\star{\boxed{\red{Perimeter_{(isosceles\: triangle)} = (2a + b)}}}}$

⠀

$\sf{\dashrightarrow{45 = 3x - 12}}$

⠀

$\sf{\dashrightarrow{3x = 45 + 12}}$

⠀

$\sf{\dashrightarrow{3x = 57}}$

⠀

$\sf{\dashrightarrow{x = \dfrac{57}{3}}}$

⠀

$\mathfrak{\dashrightarrow{\boxed{\pink{x = 19}}}}$

⠀

Hence,

• Base = 19 m
• Two equal sides = (x - 6) = (19 - 6) = 13 m