Question

A triangular sign board is isosceles. Given that the unequal side is 7 cm and the perimeter of the triangle is 25 cm. What is the measure of the third side? (a)-5 cm (b)-9 cm (c)-7 cm (d)-none of the above

Answer 1

Its is a property of an isosceles triangle that two of its sides hold equal measure.

so, In ΔABC,

we assume the equal side to be AC and AB

AC = AB

and we are given that,

BC =  7

now,

AB + BC + AC = 25

AB + 7 + AC = 25

AB + AC = 18

2AB = 18

AB = 9

So, the measure of the third side is 9.

Hope it Helps !!!

Answer 2

Answer:

9 is answer of question