Congruence of Triangles
Exercise 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 mÐA = mÐB.
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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