Question

plzz help me explane in steps​

Answer 1

1) Sum of linear angles = 180

(5x + 10) + 5x = 180
10x = 170
x = 17

2)Let the angles be 4x, 3x, 2x

So, 4x + 3x + 2x = 180 ( Angle sum )
9x = 180
x = 20

So the angles are 80, 60, 40.

3) If you draw a diagonal (say BD), then the quad. is divided into 2 triangles.
And sum of all the angles of a triangle = 180
So, Sum of angles of 2 traingles = 180 + 180 = 360

Hence proved.

Hope it helps
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