# Angle Sum Theorem

In geometry, the angle sum theorem states that the sum of the angles in a triangle is always 180 degrees. This theorem applies to all triangles, no matter what their size or shape. Let's take a closer look at why this is so.

To understand why the angle sum theorem is true, it helps to think about a triangle as half of a rectangle. If you draw a line down the middle of a rectangle, you create two triangles. The angle sum theorem states that the sum of the angles in each triangle is always 180 degrees. So, if you add up the angles in both triangles, you get 360 degrees—which just happens to be the total number of degrees in a rectangle!

Now that we know why the angle sum theorem is true, let's see how we can use it to solve problems. Suppose we have a triangle with two angles that measure 30 degrees and 60 degrees. We can use the angle sum theorem to figure out the measure of the third angle. Since we know that the sum of all three angles must be 180 degrees, we can set up an equation like this:

### 30 + 60 + x = 180

### x = 180 - 30 - 60

### x = 90

## Conclusion:

So there you have it! The angle sum theorem is a handy tool that you can use to solve problems involving triangles. Just remember that no matter what size or shape a triangle is, the sum of its angles will always be equal to 180 degrees.

## FAQ

### How do you find the angle sum theorem?

The angle sum theorem states that the sum of the angles in a triangle is always 180 degrees. This theorem applies to all triangles, no matter what their size or shape. To find the angle sum theorem, simply add up the measures of the angles in any triangle to get 180 degrees.

### What is the meaning of angle sum?

The angle sum of a triangle is the sum of the measures of the angles of the triangle. The angle sum of a triangle is always 180 degrees.

### What does the triangle angle sum theorem state?

The triangle angle sum theorem states that the sum of the angles in a triangle is always 180 degrees. This theorem applies to all triangles, no matter what their size or shape.

### What are the 4 theorems in geometry?

The four theorems in geometry are the angle sum theorem, the Pythagorean theorem, the triangle inequality theorem, and the parallelogram law. These theorems are important tools that you can use to solve problems involving triangles, rectangles, and other geometric shapes. Thanks for asking!