I can decide if three values could be the lengths of the sides of a triangle.

I can use information from my peers to improve my writing and be more precise.

I can write a conjecture about the side lengths in a triangle.

I can apply the Triangle Inequality Theorem.

I can write and justify an inequality about side lengths in a triangle.

I know that, in a triangle, larger angles are opposite longer sides and vice versa.

I can use what I know about the sides and angles in a triangle to find information about the sides and angles in complicated figures made up of triangles.

I can figure out and ask for the information needed to solve a problem involving triangles.

I can label and make conjectures from diagrams.

I can prove vertical angles are congruent.

I can identify, describe, and perform rigid transformations accurately.

I can prove alternate interior angles are congruent.

I can prove corresponding angles are congruent.

I can prove the angles in a triangle sum to 180 degrees.

I can identify corresponding parts in congruent figures.

I can identify the triangle congruence theorem that proves two triangles are congruent.

I can use the triangle congruence theorems to prove two triangles are congruent.

I can critique a proof about quadrilaterals.

I can prove theorems about quadrilaterals.

I can rewrite a conjecture so it is specific enough to prove.

I can prove theorems about the diagonals of a parallelogram.

I can use rigid transformations to prove quadrilaterals are congruent.

I can write conjectures about quadrilateral congruence.