Question

two sides of a triangle are equal and measure 5cm each if the perimeter of the triangle is 13cm find the third su
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Answer 1

Answer:

3 cm

Step-by-step explanation:

total length of equal sides = 10cm

perimeter = 13 cm

length of 3rd side = (13-10)cm = 3 cm

Answer 2

Given :

Two sides of a triangle of 5 cm each and perimeter of a triangle is 13 cm

To find :

Third side

Know :

If any two sides of a triangle are equal then it is a isosceles triangle.see figure 1.0

$\huge\tt{\bold{\underline{\underline{Answer᎓}}}}$

Step by step explanation:

$\bold{\boxed{Perimeter \: of \: an \: isosceles \: triangle = 2a + b}}$

$= > 2 \times 5 + b = 13$

$= > 10 + b = 13$

$= > b = 3cm$

Hence ,The third side is 3 cm

Learn more :

$</strong><strong>\</strong><strong>b</strong><strong>o</strong><strong>l</strong><strong>d</strong><strong>{</strong><strong>\</strong><strong>b</strong><strong>o</strong><strong>x</strong><strong>e</strong><strong>d</strong><strong>{</strong><strong>Area</strong><strong> \: of \: a \: </strong><strong>T</strong><strong>riangle = \frac{1}{2} \times b \times h</strong><strong>}</strong><strong>}</strong><strong>$

Some properties of Triangle:

• A triangle have three vertices namely A,B & C which would be denoted as ∆ABC
• The sum of two sides of a triangle always greater than the third one
• Sum of interior angles is equal to the exterior angles formed
• The sum of angles inside a triangle is 180°