Finding the Center of Rotation

This video tutorial explains how to find the center of rotation for geometric shapes. It begins with an introduction to the concept and demonstrates using GeoGebra software to locate the center. The tutorial then covers a manual method using a compass and ruler, providing step-by-step instructions. The video concludes with practice examples and encourages viewers to use accompanying worksheets for further practice.

What is the direction of positive rotation?

• Upwards

• Anticlockwise

• Downwards

• Clockwise

What tool is mentioned for finding the center of rotation using software?

• GeoGebra

• AutoCAD

• MATLAB

• SketchUp

What is the first step in manually finding the center of rotation?

• Draw a circle around the shape

• Connect any two corresponding vertices

• Calculate the area of the shape

• Measure the angles of the shape

What do you find after connecting two corresponding vertices?

• The angle of rotation

• The perpendicular bisector

• The midpoint of the line

• The length of the line

Where do the perpendicular bisectors intersect?

• At the midpoint of the shape

• At the center of rotation

• At the edge of the shape

• At the vertex of the shape

What shape is used in the second example of finding the center of rotation?

• Triangle

• Square

• Circle

• Rectangle

What is the angle of rotation mentioned for the rectangle?

• 360°

• 140°

• 90°

• 180°

What tool is used to draw arcs when finding the perpendicular bisector manually?

• Ruler

• Compass

• Protractor

• Calculator

What is the final step in finding the center of rotation manually?

• Rotate the shape 360°

• Calculate the area of the shape

• Draw a straight line between intersecting arcs

• Measure the distance between points

What is suggested for further practice on finding the center of rotation?

• Attend a workshop

• Use the worksheet on the website

• Watch more videos

• Read a textbook