CPM Homework Help : GB8I Problem 11-73

In the figure at right, $DE = BE = AE = CE$ . Is $ΔDAB ≅ ΔCBA$ ? Justify your answer using a flowchart.

Hint 1:

Make a drawing on paper and mark the four congruent segments.

Hint 2:

Both triangles, although they overlap each other, have right angles, and they share a side $AB$ .
Review the Math Notes box in section 7.1.7.

More Help:

$ΔAEB$ is an isosceles triangle, which makes $∠CAB≅∠DBA$ .
Consider which triangle congruence condition can be met.

Line segments, A,C, & B,D, intersect at E, with line segment from A, to B, with angles D,A,B, & C,B,A, each a right angle.