In an isosceles triangle, one side is 20cm and the other is 10cm. Which one is the basis.

From the condition, we know that in an isosceles triangle, one side is 20 cm, and the other is 10 cm. In order to find which side is the base, recall the property of the sides of the triangle.

So, a triangle exists if the sum of the lengths of the two sides of the triangle is always greater than the third.

Let’s check it out.

If the base is 20 cm, then the sides are 10 cm.

10 + 10 = 20 (condition is not met).

If the base is 10 cm, and the sides are 20 cm, then

20 + 20> 10, the condition is met.

Answer: the base is 10 cm.

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