# Isosceles triangle

An isosceles triangle has an angle against the base that measures 55°.

What is the size of the angle at the base of an isosceles triangle? (Calculation and procedure)

What is the size of the angle at the base of an isosceles triangle? (Calculation and procedure)

## Correct answer:

Tips for related online calculators

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

### Units of physical quantities:

### Grade of the word problem:

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

## Related math problems and questions:

- Isosceles 65784

An isosceles triangle has an angle of 78°20' at the base. Calculate the size of the angle between the arms. - Determine 82143

Determine the size of the interior angles in an isosceles triangle if you know that the angle opposite the base is 15° greater than the angles at the base. - Main/central vertex

ABC is an isosceles triangle with base BC and central vertex A. The angle at vertex A is 18°. What will be the size of the angle at vertex B? - Flowerbed

The flowerbed has the shape of an obtuse isosceles triangle. The arm has a size of 5.5 meters, and an angle opposite the base size is 94°. What is the distance from the base to the opposite vertex?

- Calculate 71764

The angle at the base of an isosceles triangle is 18 ° larger than the angle at the central vertex. Calculate the size of the interior angles. - Construction 83208

An isosceles triangle ABY has a base AB of length 5 cm and an angle at the primary vertex of 50°. Write down the construction progress. - Outer angles

The outer angle of the triangle ABC at the A vertex is 71°40 ' outer angle at the vertex B is 136°50'. What size has the inner triangle angle at the vertex C?