LESSON: Congruent and Similar Figures

Objectives/Vocab

Objectives

  • Identify given triangles as similar, congruent or neither.
  • Identify corresponding parts of congruent figures.
  • Identify corresponding parts of similar figures.
  • Find unknown measures of corresponding parts of similar figures.
  • Use similar figures to measure indirectly.

Vocabulary

Congruent
having the same size and shape and measurement
Similar
having the same shape, but not the same size. Similar shapes are proportional to each other.
Corresponding
matching-corresponding sides between two triangles are sides that match up
Ratio
a way of comparing two quantities
Proportion
a pair of equal ratios.
Indirect Measurement
using the characteristics of similar triangles to measure challenging things or distances.