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(a) The angles of a quadrilateral are xº, 2xº, 4xº, 5xº.  Find x.

 

(b) The angles of a triangle are 2xº, 5xº, (x+20)º.  Find x.

 Aug 13, 2020
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x°+2x°+4x°+5x°=12x°

360x° : 12x° = 30

                x = 30

 

2x°+5x°+x°+20°=180°  | -20°

                   8x°=160°

      160x° : 8x° = 20

                     x = 20

laugh

 Aug 13, 2020

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