The perimeter of a triangle is 28cm. One of it’s sides is 8cm. Write all the sides of the possible isosceles triangles with these measurements.


Given:


Perimeter of triangle = 28 cm


Length of one side =8 cm


Triangle is isosceles


So let the equal side be b


Perimeter = a + 2b


8 + 2b = 28


2b = 20


b = 10 cm


So length of equal sides = 10 cm.


The two equal sides can also be 8 cm


16 + a = 28


a = 12 cm.


So new side length = 8, 8, 12 cm.


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