Ratios and Proportions, Similar Polygons, and Proportions in Triangles

How do these triangles appear to be similar?

• AA~

• SAS~

• SSS~

• Not Similar~

All Equilateral triangles can be proven similar by AA~

• TRUE

• FALSE

All Equilateral triangles are similar

• TRUE

• FALSE

If two polygons are similar, then the ratio of their perimeters is equal to the ratios of their _______________.

• Proportions

• Corresponding Sides

• Similar Polygons

• Perimeters

If two triangles are isosceles and if a base angle of one is congruent to a base angle in the other, then the triangles are similar.

• TRUE

• FALSE

If the midpoints of the sides of a triangle are joined to form another triangle, this new triangle is similar to the original triangle.

• ALWAYS

• SOMETIMES

• NEVER

If one side of a triangle is proportional to one side of another triangle, then the triangles are similar.

• ALWAYS

• SOMETIMES

• NEVER

If two sides of one triangle are proportional to two sides of another triangle, then the triangles are similar.

• ALWAYS

• SOMETIMES

• NEVER

If two angles of one triangle are congruent to two angles in another triangle, then the triangles are similar.

• ALWAYS

• SOMETIMES

• NEVER