# Isosceles triangle

In an isosceles triangle, the arm's length and the length of the base are in a ratio of 3 to 5. What is the length of the arm?

## Correct answer:

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Calculation of an isosceles triangle.

See also our trigonometric triangle calculator.

Do you have a system of equations and are looking for calculator system of linear equations?

Do you want to convert length units?

Calculation of an isosceles triangle.

See also our trigonometric triangle calculator.

### You need to know the following knowledge to solve this word math problem:

**algebra**- system of equations
- expression of a variable from the formula
**planimetrics**- perimeter
- triangle
**basic functions**- ratio

### Units of physical quantities:

### Grade of the word problem:

We encourage you to watch this tutorial video on this math problem: video1

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