Chapter C4- similarity

Question 1

Define similar figures

Answer 1

Similar figures are figures that have the same shape but not necessarily the same size

Question 2

If two triangles are similar:

Answer 2

• all the corresponding angles are equal

- all pairs of corresponding sides are in the same proportion

Question 3

To prove two triangles similar, one of the following must apply:

Answer 3

• Triangles have to be equiangular, which means all the corresponding angles are equal. Two pairs of angles must be proved equal, then the third will be equal, because interior angles of a triangle add up to 180 degrees. (All corresponding sides will then be in the same proportion)
  - The corresponding sides are in the same proportion. (Then all the corresponding angles are equal)