Triangles and Transversal Test

A triangle is a polygon with three edges and three vertices. The sum of the interior angles of a triangle is always 180 degrees.

1. Equilateral Triangle: All sides are equal. 2. Isosceles Triangle: Two sides are equal. 3. Scalene Triangle: All sides are different.

1. Acute Triangle: All angles are less than 90 degrees. 2. Right Triangle: One angle is exactly 90 degrees. 3. Obtuse Triangle: One angle is greater than 90 degrees.

Alternate interior angles are pairs of angles that are on opposite sides of a transversal and inside the two lines. They are equal when the lines are parallel.

Corresponding angles are pairs of angles that are in the same position on two different lines cut by a transversal. They are equal when the lines are parallel.

The sum of the interior angles in a triangle is always 180 degrees.

To find an unknown angle, subtract the sum of the known angles from 180 degrees.

A transversal is a line that intersects two or more lines at different points.

Angles formed by a transversal can be classified as alternate interior angles, corresponding angles, and same-side interior angles, with specific properties when the lines are parallel.

The alternate interior angles are equal.