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# Rd Chapter 9- Triangle and its Angles Ex-VSAQS Interview Questions Answers

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Question 1 : Define a triangle.

Answer 1 : Triangle is a three-sided polygon that consists of three edges and three vertices. The most important property of a triangle is that the sum of the internal angles of a triangle is equal to 180 degrees.

Question 2 : Write the sum of the angles of an obtuse triangle.

Answer 2 : The sum of angles of obtuse triangle = 180°.

Question 3 : In △ABC, if ∠B = 600, ∠C = 800 and the bisectors of angles ∠ABC and ∠ACB meet at point O, then find the measure of ∠BOC.

B = 600, C = 800 (given)

As per question:

OBC = 600/2= 300 and

OCB = 800/2= 400

In triangle BOC,

OBC + OCB + BOC = 180 0

[Sumof angles of a triangle = 1800]

300 +400 + BOC = 1800

BOC = 1100

Question 4 : If the angles of a triangle are in the ratio 2:1:3, then find the measure of smallest angle.

Let angles of atriangles are 2x, x and 3x, where x is the smallest angle.

To find: measure of x.

As, Sum of angles of atriangle = 1800

2x + x + 3x = 1800

6x = 1800

Question 5 : If the angles A, B and C of △ABC satisfy the relation B – A = C – B, then find the measure of ∠B.

Sum of angles of atriangle = 1800

A + B + C = 1800 …(1)

B – A = C – B …(Given)

2B = C + A …(2)

(1) => 2B + B = 1800

3B =1800

Or B = 600

Todays Deals  ### Rd Chapter 9- Triangle and its Angles Ex-VSAQS Contributors krishan

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