## How to Check for Squareness

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### Introduction

When it comes to teaching students how to make sure your foundation has a true 90 degree corner to work from, I like to use the simple "3, 4, 5 Rule." This is also known as the Pythagorean Theorem (A^2 +B^2 = C^2). This is truly a great and easy way to assure a square foundation. This is also a good way to reintroduce the basic geometry that they learned in math class. Now they will have a chance to use it in a practial setting or real life.

2 hour block
120 Minutes

### Industries / Subjects / Grades

##### Industries / Pathways
• Building and Construction Trades
• Residential and Commercial Construction
• Mechanical Systems Installation and Repair
• Cabinetry, Millwork, and Woodworking
• Engineering and Heavy Construction
• 9
• 10
• 11
• 12

### Objectives What will they get out of it.

#### Related Instructional Objectives (SWBAT...)

• Students will be able to use the Pythagorean theorem in a hands on activity.
• Students will be able to show how geometry is used out of the classroom in a real world setting.
• Students will be able to layout a corner using a 3,4,5 method based on a Pythagorean theorem
• Students will be able to establish a corner using a simple 3,4,5 method.

or now!