Question types

Congruency: Congruent Triangles question types

23 questions across 5 question groups — pick any mix to generate a MATHS paper with step-by-step answer keys.

23
Questions
5
Question groups
5
Question types
Sample Questions

Congruency: Congruent Triangles questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 10[3 marks sum]3 Marks
In the given figure ;
$
\angle 1=\angle 2 \text { and } A B=A C \text {. }
$
Prove that:
(i) $\angle B=\angle C$
(ii) $BD = DC$
(iii) $A D$ is perpendicular to $B C$.
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Q 12[3 marks sum]3 Marks
The given figure shows a triangle $A B C$ in which $A D$ is perpendicular to side $B C$ and $B D=C D$. Prove that:
(i) $\triangle A B D \cong \triangle A C D$
(ii) $A B=A C$
(iii) $\angle B=\angle C$
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Q 14[4 marks sum]4 Marks
State, whether the pairs of triangles given in the following figures are congruent or not:
Δ ABC in which AB = 2 cm, BC = 3.5 cm and ∠C = 80° and Δ DEF in which DE = 2 cm, DF = 3.5 cm and ∠D = 80°.
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Q 15[4 marks sum]4 Marks
Use the information given in the following figure to prove triangles $A B D$ and $C B D$ are congruent. Also, find the values of $x$ and $y$.
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Q 16[4 marks sum]4 Marks
$A B C$ is an equilateral triangle, $A D$ and $B E$ are perpendiculars to $B C$ and $A C$ respectively. Prove that:
(i) $AD = BE$
(ii) $BD = CE$
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Q 17[4 marks sum]4 Marks
In the given figure, prove that:
(i) $\triangle AOD \cong \triangle BOC$
(ii) $A D=B C$
(iii) $\angle ADB =\angle ACB$
(iv) $\triangle ADB \cong \triangle BCA$
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Q 18[4 marks sum]4 Marks
Prove that:
(i) $\triangle ABD \cong \triangle ACD$
(ii) $\angle B=\angle C$
(iii) $\angle ADB =\angle ADC$
(iv) $\angle A D B=90^{\circ}$
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Q 19[5 marks sum]5 Marks
Prove that:
(i) $\triangle ABD \cong \triangle ACD$
(ii) $\angle B=\angle C$
(iii) $\angle ADB =\angle ADC$
(iv) $\angle A D B=90^{\circ}$
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