pastormac2011
15.07.2020 •
Mathematics
If in a quadrilateral ABCD in which AB =5cm,BC=4cm,CD=3.5cm ,DA= 2.5cm,and AC=5.5cm.
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Ответ:
We will use the property :
sum of interior angles on same side of transversal =180
(8x-14) + (2x+54)=180
10x+40=180
10x=140
x=14