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Test: Problems on Similar Triangles - Class 10 MCQ


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10 Questions MCQ Test Online MCQ Tests for Class 10 - Test: Problems on Similar Triangles

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Test: Problems on Similar Triangles - Question 1

Consider the triangle shown in the figure where BC = 12 cm, Db = 9 cm, CD = 6 cm and What is the ratio of the perimeter of the triangle ADC to that of the triangle BDC?

Detailed Solution for Test: Problems on Similar Triangles - Question 1

Here, ∠ACB = c+180-(2c-b) = 180-(b+c)
So, We can say that Δ BCD and &delta ABC will be similar.
According to property of similarity,
AB/12 = 12/9 
Hence, 
AB = 16
AC/6 = 12/9 
AC = 8
Hence, AD = 7 and AC = 8
Now,
Perimeter of Δ ADC / Perimeter of ΔBDC,
= (6+7+8)/(9+6+12) 
= 21/27 = 7/9.

Test: Problems on Similar Triangles - Question 2

In ΔPQR, ∠P = 60°, ∠Q = 50°. Which side of the triangle is the longest ?

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Test: Problems on Similar Triangles - Question 3

If ABC and PQR are similar triangles in which ∠ A = 470 and ∠ Q = 830, then ∠ C is:

Test: Problems on Similar Triangles - Question 4

In the given figure, T and B are right angles. If the lengths of AT, BC and AS (in centimeters) are 15, 16 and 17 respectively, then the length of TC (in centimeters) is:

Detailed Solution for Test: Problems on Similar Triangles - Question 4


Test: Problems on Similar Triangles - Question 5

In the adjoining figure, AD = 2 cm, DB = 3 cm, AE = 5 cm and DE || BC, then find EC.

Test: Problems on Similar Triangles - Question 6

In an equilateral triangle ABC, if AD ⊥ BC. Then​

Detailed Solution for Test: Problems on Similar Triangles - Question 6

∆ ABC, in which sides are AB=BC= AC= a units and AD is perpendicular to BC ,

In ∆ADB ,

AB²= AD²+ BD²     (by Pythagoras theorem)

a² = AD² + (a/2)²   [BD= 1/2BC, since in an equilateral triangle altitude AD is  perpendicular bisector of BC ]

a²- a²/4 =AD²

⇒ ( 4a²-a²)/4 = AD²

⇒ 3a² /4 = AD²

⇒ 3AB²/4= AD²               [ AB= a]

⇒  3AB²= 4AD²

Test: Problems on Similar Triangles - Question 7

In two triangles ABC and PQR,Given that ∠A = ∠R and ∠B = ∠Q, which of the following is true?​

Detailed Solution for Test: Problems on Similar Triangles - Question 7

∠A = ∠R and ∠B = ∠Q
The names of triangles are written in such a manner in which the Angles are correspondingly equal which means that the vertices at which the angles of the two triangles are equal is placed accordingly. So since the the angle A and Angle R are equal and Angle B and Angle D are equal we have ΔABC - ΔRQP

Test: Problems on Similar Triangles - Question 8

Triangles ABC, DEF are similar, ∠A = 75° , ∠B = 85° so ∠F = ?​

Test: Problems on Similar Triangles - Question 9

A vertical stick 30 m long casts a shadow 15 m long on the ground. At the same time, a tower casts a shadow 75 m long on the ground. The height of the tower is:​

Detailed Solution for Test: Problems on Similar Triangles - Question 9


Test: Problems on Similar Triangles - Question 10

Given two triangles ABC and PQR such that, AB = 2 cm, PQ = 3cm, ∠B = ∠Q BC = 5 cm, QR = 7.5 cm. AG and PS are medians . Find AG/PS = ?​

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