always sometimes never
Two equilateral triangles
always
Two squares
always
an equilateral triangle and an equiangular triangle
always
two isosceles triangles are similar if a base angle of one is congruent to a base angle of another
always
two isosceles triangles are similar if the vertex angle of one is congruent to the vertex angle of another
always
two regular hexagons
always
a kite and a parallelogram
never
a right triangle and an acute triangle
never
an isosceles triangle and a scalene triangle
never
Two isosceles triangles
sometimes
Two right triangles
sometimes
a right triangle and a scalene triangle
sometimes
if two sides of one triangle are proportional to two sides of a 2nd triangle the triangles are similar
sometimes
two isosceles trapezoids
sometimes
two rectangles
sometimes
two regular polygons
sometimes
two rhombuses
sometimes
two scalene triangles
sometimes