Thursday and Friday we will have a unit test over Triangles and Triangle Congruence worth 60 pts. Test hints will be sent home on the next block, as well as a review assignment. On Thursday-Friday, I will hand out a final review assignment also.

Today was a big deal day in Pre-AP Geometry. We worked hard to be able to write "mini-proofs" ... a 5 or 6 step proof that uses Triangle Congruence Shortcuts and CPCTC (corresponding parts of congruent triangles are congruent). Students were given a sketch, two pieces of information, and a question that became the "Show" statement of a proof.

Attached below is the fill-in-the-blank proof of the Perpendicular Bisector Theorem (Every point on the perpendicular bisector of a segment is equidistant from the endpoints of the segment.) It is also a decent guide to how to proceed on the homework.

HW #9 - p 231:1-9. Due next block. For each problem, copy the sketch, the givens, and change the question into a "Show" statement. Then write a 5-6 step mini-proof. Three of the questions end up "Cannot Be Determined". On problems 5 and 7, you need to add a segment to the sketch (see back of book). On problems 2-4 and 7, you need to decide which triangles need to be congruent (based on the question asked).

Today was a big deal day in Pre-AP Geometry. We worked hard to be able to write "mini-proofs" ... a 5 or 6 step proof that uses Triangle Congruence Shortcuts and CPCTC (corresponding parts of congruent triangles are congruent). Students were given a sketch, two pieces of information, and a question that became the "Show" statement of a proof.

Attached below is the fill-in-the-blank proof of the Perpendicular Bisector Theorem (Every point on the perpendicular bisector of a segment is equidistant from the endpoints of the segment.) It is also a decent guide to how to proceed on the homework.

HW #9 - p 231:1-9. Due next block. For each problem, copy the sketch, the givens, and change the question into a "Show" statement. Then write a 5-6 step mini-proof. Three of the questions end up "Cannot Be Determined". On problems 5 and 7, you need to add a segment to the sketch (see back of book). On problems 2-4 and 7, you need to decide which triangles need to be congruent (based on the question asked).

proof_-_perpendicular_bisector_theorem.pdf |