In a rectangle with two equal sides and a perimeter of 50cm. third side = 18cm.

In a rectangle with two equal sides and a perimeter of 50cm. third side = 18cm. The first side of the triangle is less than its third side.

The perimeter of a triangle is equal to the sum of the lengths of its three sides. If you know that his two sides are equal and the third party is known, then you can find the sum of two equal sides.
a + a = 2a = 50 – 18 = 32 (cm)
a = 32: 2 = 16 (cm).
To find out how many times one side is smaller than the other, you need to divide the side with the longer length into the side with the shorter length.
18: 16 = 1.125 (times)
Answer. 1.125 times.