Question

find find the perimeter of each of the following shapes;

i) a triangle of sides 3cm ,4cm
and 5cm

ii) an equilateral triangle of side 9cm

iii) an isosceles triangle with equal sides 8 cm each and third side 6 cm

​

Answer 1

Answer:

I) 12cm

ii) 27 cm

iii) 22 cm

Step-by-step explanation:

hope it is helpful to you

please like it

and mark me as brainlist

and please follow me

Answer 2

Question:

Find the perimeter of each of the following shapes:

• A triangle of sides 3 cm, 4 cm and 5 cm
• An equilateral triangle of side 9 cm
• An isosceles triangle with equal sides 8 cm each and third side 6 cm

Solution:

Need to find: A triangle, an equilateral triangle and isosceles triangle

Given:

• A triangle of sides 3 cm, 4 cm and 5 cm
• An equilateral triangle of side 9 cm
• An isosceles triangle with equal sides 8 cm each and third side 6 cm

Step-by-step explanation:

❂ Let us find the triangle by using the formula Perimeter of triangle = a + b + c

Applying the known values,

➦ Perimeter of triangle = 3 + 4 + 5

➦ Perimeter of triangle = 12 cm

_____________________________

Now,Let us find the equilateral triangle by using the formula, Perimeter of equilateral triangle = 3a.

Putting the values,

➦ Perimeter of equilateral triangle = 3 × 9

➦ Perimeter of equilateral triangle = 27 cm

_____________________________

Now,find the isosceles triangle,by using the formula :Perimeter of isosceles triangle = 2a + b

➦ Perimeter of isosceles triangle = 2(8) + 6

➦ Perimeter of isosceles triangle = 16 + 6

➦ Perimeter of isosceles triangle = 22 cm

_____________________________

Required answer:

• Therefore,the perimeter of triangle is 12 cm,perimeter of equilateral triangle is 27 cm and Perimeter of isosceles triangle is 22 cm.

_____________________________