A, B, and C show three types of triangular prisms: right, isosceles, and equilateral. When put together…

Illustrations of an isosceles trapezoid with equal diagonals drawn.

Illustration showing a triangle with an altitude CD passing through the middle of EF. Triangles AEC…

Illustration to show altitudes drawn from base angles of an isosceles triangle.

Illustration showing an isosceles triangle with a segment inside. This can be used to show that in an…

Illustration to show the medians drawn to the legs of an isosceles triangle.

Illustration to show that if from any point in the base of an isosceles triangle parallels to the legs…

Illustration to show the perpendiculars dropped from the midpoint of the base to the legs of an isosceles…

Illustration to show that the difference of the distances from any point in the base produced of an…

Illustration of three isosceles triangles with the same base AC but varying heights (as B gets farther…

An illustration showing an isosceles triangle in an equilateral triangle.