Download 4-1 Congruent Figures

L.E.Q. How do you identify congruent figures
and their corresponding parts?

The Same Shape and The Same Size.

Polygons that have congruent corresponding
parts – their matching sides and angles.

Always list corresponding vertices in the
same order.

Sides:

Angles:

The fins of the space shuttle discovery model
congruent pentagons. Find mB .

Two triangles are congruent if and
only if they have 3 pairs of congruent
corresponding sides and 3 pairs of
congruent corresponding angles.

Decide whether the triangles are congruent.
Justify your answer.
◦ 3 Sides:
◦ 3 Angles:

If 2 angles of one triangle are congruent to
two angles of another triangle, then the third
angles are congruent.
◦ So based upon the picture, we can conclude that…

Use the info in the diagram to prove that
PQR  PSR. Give a reason why each
statement is true.

Suppose that 2 pentagons are congruent.
How many pairs of congruent corresponding
parts are there? Explain.

Pgs. 182 – 183 #s 1 – 12, 16 – 28, 30 - 31.