**Congruence of Triangles**

**Exerci****se 7.1**

1). Complete the following statements:

(a) Two line segments are congruent __if they have the same length__.

(b) Among two congruent angles, one has a measure of 70°; the measure of the other angle is __70____°____.__

(c) When we write ÐA = ÐB, we actually mean __mÐ____A = mÐ____B.__

2). Give any two real-life examples for congruent shapes.

Ans: i). toys made up of the same mould

ii). razor blades of the same company

3). If DABC @ DFED under the correspondence ABC « FED, write all the corresponding congruent parts of the triangles.

DABC @ DFED . . . . . . given

Corresponding Sides

AB ↔ FE

BC ↔ ED

AC ↔ FD

Corresponding Angles

ÐA ↔ ÐF

ÐB ↔ ÐE

ÐC ↔ ÐD

4). If DDEF @ DBCA, write the part(s) of DBCA that correspond to

(i) ÐE (ii) EF (iii) ÐF (iv) DF

Given: DDEF @ DBCA

(i). ÐE ↔ ÐC

(ii). EF ↔ CA

(iii). ÐF ↔ ÐA

(iv). DF ↔ BA

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