The perimeter of the isosceles triangle is 88.
A triangle is a polygon with three sides and three angles. There are different types of triangles such as scalene, equilateral, isosceles and so on.
From the diagram, two sides of the triangle are equal, hence it is an isosceles triangle, hence:
10a - 9 = 14a - 25
4a = 16
a = 4
10a - 9 = 10(4) - 9 = 31
6a + 2 = 6(4) + 2 = 26
Hence the perimeter of the triangle = 31 + 31 + 26 = 88
Hence the perimeter of the triangle is 88.
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