Semester 1 Final review

Front

What is the slope of a line perpendicular to a line with slope -6/5?

Back

5/6

Front

Which formula is used to find the sum of the interior angles of a polygon?

Back

(n-2)180

Front

What does the exterior angle theorem state?

Back

The exterior angle of a triangle is equal to the sum of the two opposite interior angles.

Front

How do you find the value of x in a triangle using the exterior angle theorem?

Back

Identify the exterior angle and the two opposite interior angles, then set up the equation.

Front

What is the sum of the interior angles of a triangle?

Back

180 degrees.

Front

What is the definition of coplanar points?

Back

Points that lie on the same plane.

Front

How do you determine if points are coplanar?

Back

If a single plane can contain all the points, they are coplanar.

Front

What is the formula for the sum of the interior angles of a quadrilateral?

Back

360 degrees.

Front

What is the relationship between the slopes of perpendicular lines?

Back

The product of their slopes is -1.

Front

What is the formula for finding the slope of a line given two points (x1, y1) and (x2, y2)?

Back

m = (y2 - y1) / (x2 - x1).