6.4 Use the ASA Postulate, and the AAS Theorem, and the HL Theorem. Prove that triangles are congruent. Use triangulation to find the positions of distant objects. 6.5 Use corresponding parts of congruent triangles. Write proofs that use congruent triangles to prove other statements.
Measure distances indirectly.
Apply the Isosceles triangle Theorem and its converse. Find measures in isosceles triangles and write proofs using isosceles triangles. 6.7 Identify and draw medians and altitudes of triangles. Explore the properties of medians and altitudes of triangles.