Forget Waldo - Where is 'the orthocenter'?

Starting with a set of three points, students will practice finding equations of lines and the lines that are perpendicular to them. The students will repeat this process three times - using different colors for differentiating one line from the next. The big finale brings all the work together and the students realize this activity leads to finding the orthocenter of a triangle.

Resource ID#: 37241 Type: Lesson Plan

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General Information

Subject(s): Mathematics

Grade Level(s): 8, 9, 10

Intended Audience: Educators

Instructional Time: 50 Minute(s)

Keywords: System of Equations, slopes of perpendicular lines, orthocenter, point of concurrency, concurrent lines, altitude, triangles

Instructional Component Type(s): Lesson Plan

Resource Collection: CPALMS Lesson Plan Development Initiative

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