Tangents An external tangent of two circles Draw
- Slides: 20
Tangents An external tangent of two circles
Draw on the whiteboard what you think an EXTERNAL tangent would look like KEYWORDS
Take the radius of the smaller circle KEYWORDS: External Radius
Add the smaller radius to the bigger circle KEYWORDS: External Radius
For external tangents always subtract the small circles radius from the bigger circles radius. This is so you are now constructing a tangent from a point to a circle KEYWORDS: External Radius
Now that the smaller circle has been reduced to a point, join that point to the centre of the new circle (same) KEYWORDS: External Radius
Bisect line that joins the point to the circle KEYWORDS: External Radius Bisect
Bisect line that joins the point to the circle KEYWORDS: External Radius Bisect
Bisect line that joins the point to the circle KEYWORDS: External Radius Bisect
Construct a semi-circle with the diameter from the centre of the circle to the point P KEYWORDS: External Diameter Radius Bisect
Always construct a triangle in the semi-circle with the diameter as the base and apex where the circle intersects the semi-circle. KEYWORDS: External Diameter Radius Bisect
Always construct a triangle in the semi-circle with the diameter as the base and apex where the circle intersects the semi-circle. ing t c u r onst c f you o e e l l c p r inci i-ci r m p e s 90 i e s h t e l a ang From ngle in x e ap a a tri that the know s ee degr KEYWORDS: External Diameter Radius Bisect
Transfer the tangent out parallel and extend the normal KEYWORDS: External Diameter Radius Bisect
Transfer the tangent out parallel and extend the normal KEYWORDS: External Diameter Radius Bisect
Find other POC by constructing a line at 90 degrees to the tangent through the centre KEYWORDS: External Diameter Radius Bisect
KEYWORDS: External Diameter Radius Bisect
KEYWORDS: External Diameter Radius Bisect
Let’s try a question Example 1: pg 188 Understanding Technical Graphics KEYWORDS: External Diameter Radius Bisect
Let’s try another one Question 1: pg 189 (Soap Dispenser) Understanding Technical Graphics KEYWORDS: External Diameter Radius Bisect
Let’s make definitions for our keywords • • External Radius Bisect Diameter Base Apex Parallel Point of Contact
- Line tangent to two circles
- Internal tangent vs external tangent
- 9-5 skills practice tangents
- Line that is tangent to two coplanar circles
- 9.6 secants tangents and angle measures
- Copy each figure and draw the common tangents
- Secants tangents and angle measures
- A double point is called cusp of tangents at this point are
- Properties of a tangent
- Secant of a circle
- Identify the common external tangent
- Locus of points on a side which rolls along a fixed line.
- Is a cycloid a conic section
- How to draw an isometric circle
- Radical axis formula
- External-external trips
- Label diagram of egg
- 10-5 tangents
- Internal tangents
- 10-7 segments in a circle
- Lines of convergence forensics