# Focus and Directrix Worksheets

What Is the Focus and Directrix of Parabolas? Parabola is defined as the conic section formed by an intersection of the circular surface and a parallel plane, creating a straight line. The plane in parabola lies at the same angle as the exterior surface of the cone. In mathematical terms, a parabola is the set of all the points P lying a plane equidistant from a fixed line and a fixed point. All parabolas share some common features like an axis of symmetry, vertex, directrix, and focus. The point where the plane interacts with the exterior surface of the parabola is known as the vertex. In the figure shown above, the point present on the axis of the symmetry with the right angle is known as the focus. The straight-line present on the opposite side of the parabolic curve is known as the directrix. The parabolic curve represents the set of points lying equidistant from focus and directrix.

• ### Basic Lesson

Guides students through the beginner skills of Parabolas- Focus & Directrix.

• ### Intermediate Lesson

Demonstrates how to use advanced skills to tackle Parabolas- Focus & Directrix problems.

• ### Independent Practice 1

A really great activity for allowing students to understand the concepts of the Parabolas- Focus & Directrix.

• ### Independent Practice 2

Students use Parabolas- Focus & Directrix in 20 assorted problems. The answers can be found below.

• ### Homework Worksheet

Students are provided with 12 problems to achieve the concepts of Parabolas- Focus & Directrix.

• ### Skill Quiz

This tests the students ability to understand Parabolas- Focus & Directrix.