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Course: High school geometry > Unit 9

Lesson 2: Cavalieri's principle and dissection methods
Math
High school geometry
Solid geometry
Cavalieri's principle and dissection methods
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Apply Cavalieri's principle

Google Classroom

Problem

Consider the following cylinder and cone.
Marcel tried to use Cavalieri's principle to show that the two figures have the same volume.
"The base areas are the same. Therefore, corresponding cross-sections have the same area. So the volumes must be the same."
What is the first mistake Marcel made?
Choose 1 answer: