Question

In ∆ABC,the ratio between angleA,angleB and angleC is 20:5:11.what type of triangle is ∆ABC​

Answer 1

Answer:

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For finding the type of triangle, we should find its angles.

Let the angles of triangle to be 20x, 5x and 11x.

A.T.Q

20x + 5x +11x = 180°(angle sum property of triangle )

36x = 180

x = 180/36

x = 5°

First angle = 20×5

= 100°

Second angle = 5×5

= 25°

Third angle = 11×5

= 55°

So, it is a obtuse angled triangle because it has one angle more than 90°.

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Answer 2

Step-by-step explanation:

Angles are in the ratio =1:2:3

Let the angles be x,2x,3x

Sum of angles =180

x+2x+3x=180

6x=180

x=30

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Hence, the angles are 30

∘

,60

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,90

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The triangle is a right angled triangle

Answer of your question .