Advertisements
Advertisements
Question
State whether the two triangles are congruent or not. Justify your answer
Advertisements
Solution
Let the given triangles be ∆ABC and ∆CDE
Here `bar("AC") = bar("CE")` ...(given)
∠BAC = ∠DEC ...(given)
∠ACB = ∠DCE ...(vertically opposite angles)
Two angles and the included side are equal.
Therefore by ASA criterion ∆ABC ≅ ∆CDE.
APPEARS IN
RELATED QUESTIONS
Given below are measurements of some parts of two triangles. Examine whether the two triangles are congruent or not, by the ASA congruence rule. In the case of congruence, write it in symbolic form.
∆DEF, ∠D = 60º, ∠F = 80º, DF = 6 cm.
∆PQR, ∠Q = 60º, ∠R = 80º, QP = 6 cm.
Consider the given pairs of triangles and say whether each pair is that of congruent triangles. If the triangles are congruent, say ‘how’; if they are not congruent say ‘why’ and also say if a small modification would make them congruent:
In the given figure, AC ≡ AD and ∠CBD ≡ ∠DEC. Prove that ∆BCF ≡ ∆EDF.
To conclude the congruency of triangles, mark the required information in the following figure with reference to the given congruency criterion
In the given figure ray AZ bisects ∠BAD and ∠DCB, prove that ∆BAC ≅ ∆DAC

In the given figure ray AZ bisects ∠BAD and ∠DCB, prove that AB = AD

In the following figure, Δ ______ ≅ ΔPQR.

If hypotenuse and an acute angle of one right triangle are equal to the hypotenuse and an acute angle of another right triangle, then the triangles are congruent.
In the following figure, AD ⊥ BC and AD is the bisector of angle BAC. Then, ∆ABD ≅ ∆ACD by RHS.

In the given pairs of triangles of figure, applying only ASA congruence criterion, determine which triangles are congruent. Also, write the congruent triangles in symbolic form.

