Lesson 6.4Prove Triangles Similar by AA

Objective

• Use the AA similarity postulate

Standard

• 5.0 – Students prove that triangles are congruent or similar, and they are able to use the concept of corresponding parts of congruent triangles

• 12.0 – Students find and use measures of sides and of interior and exterior angles of triangles and polygons to classify figures and solve problems

Academic Language

• Similar polygons

Think/Pair/Share

• What are necessary details to prove 2 triangles are similar?

Practice

More practice

Practice

Indirect Measurement

Try it again!

Homework

• p.384 #1, 2, 5, 9, 13, 21, 31, 32