Given are BK and ED-straight lines, CA-secant. Point C lies on line BK, point A lies on line ED.
| June 20, 2021 | education
Given are BK and ED-straight lines, CA-secant. Point C lies on line BK, point A lies on line ED. Are the straight lines BK and ED parallel, if the angle BCA = 80 degrees, the angle CAD = 100 degrees?
If the lines BK and ED are parallel, then the angles BCA and CAB should be equal, as are the internal criss-crossing angles at the intersection of two parallel lines of the third straight line. In our case, they are not equal:
<BCA = 80 °;
<CAB = 100 °.
Answer. Lines BK and ED are not parallel.
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