Duplicate the right triangle to form the isosceles triangle . Cells are face-transitive with 4 identical isosceles triangle faces. It is the dual of the triangular prism with 6 isosceles triangle faces. This plug has three rectangular pins forming an isosceles triangle. Spratly Island is shaped like an isosceles triangle. Tulsa's first flag was a non-rectangular design with the fly ending in an isosceles triangle. Duplicate the "right triangle" to form the isosceles triangle . By symmetry, , and is also a right isosceles triangle. Most triangular threadforms are based on an isosceles triangle. The space defined by the isosceles triangle came to house the museum's public functions. The Euler line of an isosceles triangle coincides with the axis of symmetry. The Golden Triangle's basement facility structure resembled that of an isosceles triangle. An isosceles triangle is constructed with equal sides . Later, the trapezium was frequently replaced by an isosceles triangle. The Euler line of an isosceles triangle is perpendicular to the triangle's base.