I°) Definition of isosceles triangle
|
A triangle is an isosceles triangle with two sides congruent.
I.1°) Property : |
|
 Replay animation |
|
|
I.2°) Construction: On track with the ruler [BC] 4 cm, then open the compass to a radius of 7 cm. Draw two arcs that intersect at A. |
II°) Properties of an isosceles triangle
| The median on the base is both a mediator of [BC], height after  and bisects the angle Â. | |
 Replay animation |
|
){kind=link}
){kind=link}