Answer:

1 . two triangles are said to be similar

a) their opposite angles are equal

b) their opposite sides are in same ratio

2. yes , they are if they have same side ratio

3.

Answer:

1) Two triangles are said to be similar if their corresponding angles are congruent and the corresponding sides are in the portion

2) Thus every square is a rectangle because it is a quadrilateral with all four angles . However not every rectangle is a square , to be a square it's must have the same length

3)pair of equilateral triangles

pair of squares.

pair of circles