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Useful geogebra resources (view source)
Revision as of 05:49, 24 January 2018
, 05:49, 24 January 2018→9. Tangents and Secants to a Circle
==== 8. Similar Triangles ====
==== 8. Similar Triangles ====
[https://www.geogebra.org/m/GhGtuvV7 Similar triangles]
1.[https://www.geogebra.org/m/GhGtuvV7 Similar triangles]
Two triangles are said to be similar, if their corresponding angles are equal or their corresponding sides are in proportion.
Two triangles are said to be similar, if their corresponding angles are equal or their corresponding sides are in proportion.
These conditions for similarity of triangles can be explored by increasing/decreasing the length of sides, flipping/rotating the triangles given in this geogebra file.
These conditions for similarity of triangles can be explored by increasing/decreasing the length of sides, flipping/rotating the triangles given in this geogebra file.
2. [https://www.geogebra.org/m/wMa7HE9m Similar triangles exploration]
The relationships between the angles and the side length of similar shapes, their respective ratios etc., could be explored through this applet.
==== 9. Tangents and Secants to a Circle ====
==== 9. Tangents and Secants to a Circle ====
[https://www.geogebra.org/m/XdmMxGVU Secant and Tangent to a Circle]
1.[https://www.geogebra.org/m/XdmMxGVU Secant and Tangent to a Circle]
A straight line which intersects a circle at two distinct points is called a secant. A straight line that touches a circle at only one point is called a tangent.
A straight line which intersects a circle at two distinct points is called a secant. A straight line that touches a circle at only one point is called a tangent.
Either of the points, B or C on the circumference of the circle can moved in this geogebra applet to discuss tangent, secant and chord, and some of their properties.
Either of the points, B or C on the circumference of the circle can moved in this geogebra applet to discuss tangent, secant and chord, and some of their properties.
2.[https://www.geogebra.org/m/xhThfJvn Construction of tangents to a circle]
This geogebra applet shows stepwise, how to construct tangents to a circle from an external point. The changes observed when the external point is moved around could be discussed.
==== 10. Mensuration ====
==== 10. Mensuration ====
