1. 4-2 The Case of the Missing Diagram
Advanced Geometry
4-2 The Case of the Missing 
 Diagram
Learner Objective: Students will organize information in, and draw diagrams for, 
 problems presented in words.

2. Warm-Up Two circles intersect at two points. Prove that the
Learner Objective: Students will organize information in, and draw diagrams for, 
 problems presented in words.
Warm-Up
Draw a diagram that accurately 
depicts the situation described
below. State the "Given" and 
"Prove" in terms of your diagram.
Complete the proof.
Two circles intersect at
two points. Prove that the
segment joining the
centers of the circles bisects
the segment joining the
points of intersection.
STATEMENTS
REASONS

3. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.
Set up a proof of the following statement:
If two altitudes of a triangle are 
congruent, then the triangle is 
isosceles.

4. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.
Set up a proof of the following statement:
The medians of a triangle are 
congruent if the triangle is equilateral.

5. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.
Set up a proof of the following statement:
The altitude to the base of an 
isosceles triangle bisects the vertex 
angle.

6. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.
Set up a proof of the following statement:
If two angles of one triangle are 
congruent to two angles of another 
triangle, the remaining pair of angles 
are also congruent.

7. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.
Assignment
4.1: 15
4.2: 3-5, 7-9

8. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.

9. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.

10. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.

11. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.

12. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.

13. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.

14. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.

15. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.

16. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.

17. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.

18. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.

19. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.

20. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.

21. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.

22. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.

23. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.

24. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.

25. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.

26. Learner Objective: Students will organize information in, and draw diagrams for, 
problems presented in words.