Question

9) The three angles of a triangle are in the ratio of 1: 2: 1. Find all angles of the triangle.

11) Of the three angles of a triangle, one is twice the smallest and another is three times the smallest . Find the
angles.

10) The three angles of a triangle are in the ratio of 3:4:5. Find all angles of the triangle.​

Answer 1

Answer:

9.let the three angles be in triangle a b c

let angle a=1x angle b=2x angle c=1x

angle a +angle b+ angle c=180° angle sum property of triangle

1x+2x+1x=180

4x=180

x=180

___

4

x=45

angle a=1x=1×45=45°

angle b=2x=2×45=90°

angle c=1x=1×45=45°

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