# All circular triangles are plane figures. All circular triangles are three-sided figures. Therefore, some three-sided figures are plane figures. Use

## Question:

All circular triangles are plane figures.

All circular triangles are three-sided figures.

Therefore, some three-sided figures are plane figures.

Use Venn diagrams to determine whether the following standard-form categorical syllogisms are valid from the Boolean standpoint, valid from the Aristotelian standpoint, or invalid. Then, identify the mood and figure, and cross-check your answers with the tables of valid syllogisms found in Section 5.1.

**Tables From Section 5.1:**

## Step by Step Answer:

**Related Book For**

## A Concise Introduction to Logic

**ISBN:** 978-1305958098

13th edition

**Authors:** Patrick J. Hurley, Lori Watson

**Question Details**

Chapter #

**5**- Categorical SyllogismsSection: Exercises 5-2

Problem: 11

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