Question

solve this problem with the help of➡➡➡

solve 12 no.​

Answer 1

Step-by-step explanation:

In an isosceles triangle two sides are equal

let the two equal sides be 'a'

one of the side = 5 3/4 cm

converting this mixed fraction into improper fraction

a = 23/4 cm

a = 23/4

Given perimeter = 18cm

From the formula of perimeter of isosceles triangle

2a + b = 18

2 ( 23/4 + b) = 18

23/4 + b = 18/2 = 9 cm

23/4 + b = 9

( 23 + 4b )/4 = 9

23 + 4b = 36

4b = 36 - 23

4b = 13

b = 13/4 cm

so the measure of the third side is 13/4 cm

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Answer 2

Answer:

two sides=5 3/4=23/4

now perimeter=x+23/4+23/4

18=x+46/4

x=18-46/4=72-46/4=26/4