## How do you find the exterior angle of a triangle?

The measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles of the triangle.

## How do you find angles of a triangle with only the sides?

“SSS” is when we know three sides of the triangle, and want to find the missing angles….To solve an SSS triangle:

- use The Law of Cosines first to calculate one of the angles.
- then use The Law of Cosines again to find another angle.
- and finally use angles of a triangle add to 180° to find the last angle.

**Is there an AAA theorem?**

Euclidean geometry may be reformulated as the AAA (angle-angle-angle) similarity theorem: two triangles have their corresponding angles equal if and only if their corresponding sides are proportional.

### What is the interior and exterior angle of a triangle?

Therefore the sum of the interior angles is always 180° 2) Exterior Angles An exterior angle of the triangle is the angle between one side of a triangle and the extension of an adjacent side. In the above triangle, ∠ a ∠b ∠c are interior angles while ∠ d is an exterior angle.

### What is the triangle exterior angle theorem?

– The sum of all interior angles of a triangle is equal to 180°. – Angle sum theorem holds for all types of triangles. – The sum of all exterior angles of a triangle is equal to 360°. – The sum of all exterior angles of a convex polygon is equal to 360°.

**How do you calculate exterior angles?**

– The measure of each exterior angle is 360°/n – Sum of exterior angles of a polygon is ∠a’ + ∠b’ + ∠c’ + ….. + ∠n’ = 360°. – The sum of the exterior angles is 360°.

## How to solve for an exterior angle?

Sum of exterior angles of a polygon. The sum of the exterior angles of any polygon is always equal to 360°.