Name: _________________________________________

1.5 Triangles _____ Sub-target 1.1: I can define, name, and label geometric terms. _____ Sub-target 1.2: I can use geometric symbols & notation, i.e. || , tick marks showing congruence, etc. Assumption – Refer to p. 59 to fill in the following. *Things you can assume:

*Things you cannot assume:

Example: In the diagrams below, which pairs of lines are perpendicular? Which pairs of lines are parallel? Which pair of triangles is congruent? Perpendicular:

Parallel:

Congruent Triangles:

Investigation: Triangles Write a good definition based on the pictures. Discuss with your partner and agree on a definition. Draw and label examples and counterexamples. Use your book starting on page 60 for help. Definition Right Triangle

Acute Triangle

Obtuse Triangle

Scalene Triangle

Equilateral Triangle

Isosceles Triangle

Examples

Counterexamples