1 / 9

# Aim: How do we review congruent triangle proofs? - PowerPoint PPT Presentation

Aim: How do we review congruent triangle proofs?. DO NOW: List as many ‘reasons’ as you can for congruent triangles. LIST OF REASONS. 1. Perpendicular lines form right angles 2. All right angles are congruent 3. If 2 angles are congruent their supplements are congruent

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PowerPoint Slideshow about ' Aim: How do we review congruent triangle proofs?' - duff

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

### Aim:How do we review congruent triangle proofs?

DO NOW:

List as many ‘reasons’ as you can for congruent triangles

• 1. Perpendicular lines form right angles

• 2. All right angles are congruent

• 3. If 2 angles are congruent their supplements are congruent

• 4. Reflexive Property

• 6. Subtraction Property

• 7. If 2 angles are congruent their complements are congruent

• 8. A midpoint divides a line segment into 2 congruent parts

• 9. If 2 sides in a triangle are congruent, then opposite angles are congruent

• 10. A tri-sector divides a line segment into 3 congruent parts

• 11. Corresponding parts in congruent triangles are congruent (CPCTC)

• 12. Halves of congruent angles are congruent

• 13. Halves of congruent line segments are congruent

• 14. If 2 angles in a triangle are congruent, then opposite sides are congruent

• 15. If at last two sides of a triangle are congruent, then the triangle is isosceles

• 16. If a triangle contains a right angle, it is a right triangle

• SAS

• Side-Angle-Side

• AAS

• Angle-Angle-Side

• ASA

• Angle-Side-Angle

• SSS

• Side-Side-Side

• The Donkey Theorem

• ASS (SSA) DOES NOT PROVE TRIANGLES CONGRUENT!

• Also: AAA only proves triangles similar, and not congruent!

• HY-LEG (Which is the hypotenuse and a leg) can only be used in RIGHT TRIANGLES!

• The homework can be found on the other side of your Reasons handout!

• Have fun?

• Good luck on the Regents!~