"Using Rulers and Compasses to Construct Angle" Parallel Lines and Intersecting Lines PPT Courseware 2

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"Using Rulers and Compasses to Construct Angle" Parallel Lines and Intersecting Lines PPT Courseware 2

Is the "Zouju pattern" on the right beautiful?

Do you want to draw it yourself?

So let’s start with the first steps!

Make beautiful patterns with rulers and compasses

1. With point O as the center and r as the radius, draw a circle O;

2. Take any point on circle O as the center and r as the radius to construct a circle that intersects circle O at two points;

3. Draw a circle with the two intersection points as the center and r as the radius;

4. Continue and paint the appropriate areas. Can you create a beautiful "Zouju pattern"?

Simplified steps for drawing an angle with a ruler:

Draw ray EF

Take O as the center of the circle and draw an arc with an appropriate length as the radius. The two sides of the intersection angle are at two points C and D;

Take E as the center of the circle, draw an arc with the same length as the radius, and intersect the line EF at point G;

Then take point G as the center of the circle, draw an arc with the same length as the radius, and intersect the original arc at point H;

Draw ray EH.

Constructing parallel lines by making equal angles

Analysis: If we take point C as the vertex to make a

The angle ∠FCE that is both in the same position and equal to ∠BAC,

Then the edge CF of ∠FCE

The straight line is what you want.

Harvest bit by bit

What did you learn in this lesson?

Share with your classmates the steps for drawing an angle with a ruler.

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For more information about the PPT courseware "Parallel lines and intersecting lines using a ruler and compass to construct angles", please click the Parallel lines and intersecting lines ppt to use a ruler and compass to construct angles ppt tag.

"Using Rulers and Compasses to Construct Angle" Parallel Lines and Intersecting Lines PPT Courseware:

"Using Rulers and Compasses to Make Angle" PPT Courseware Review and Thoughts on Parallel Lines and Intersecting Lines 1. Construct a line segment equal to a known line segment. You can make many geometric figures by using rulers and compasses without scales. Do you still remember how we use compasses and rulers? Construct a line segment equal to the given line segment..

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Update Time: 2024-11-19

This template belongs to Mathematics courseware Beijing Normal University seventh grade mathematics volume 2 industry PPT template

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