Circles and Parabolas | Precalculus (2026 Update)

In this lesson, 9.1 Circles and Parabolas, we introduce conic sections, focusing on circles and parabolas. We cover standard form equations, centers and radii of circles, completing the square, intercepts, graphing circles, and using focus, directrix, vertex, and p-value to write equations of parabolas.

🔗 Visit www.clopensets.com
for full class videos, guided notes, and printable worksheets that go along with this lesson.

🔗 ClopenSets shop: https://www.etsy.com/shop/Clopensets

#education #maths #math #highschoolmath #highschool

Chapters
00:00 Circles and parabolas
00:02 Lesson goals
00:12 Conic sections
00:31 Circle equation in standard form
01:07 Writing the equation of a circle
02:47 Completing the square for a circle
04:23 Graphing a circle from center and radius
05:01 Finding x- and y-intercepts of a circle
06:49 Introduction to parabolas
07:01 Vertex, focus, and directrix
07:30 Standard form of parabolas
08:57 Writing a parabola equation from vertex and focus
09:49 Finding the focus of a parabola
13:00 Writing a sideways parabola equation

Видео Circles and Parabolas | Precalculus (2026 Update) канала Clopensets