Answer:
1]
2]
3]
4]
Step-by-step explanation:
Given:-measure angle DCA = 18 degree
line AB II line DC
Solution:-
1] measure angle DCA and measure angle CAB are interior alternate angles and interior alternate angles are equal.
------------------ (Equation 1)
Therefore the equation for statement number 1 is
2]Sum of interior angles of triangle is equal to 180 degree.
In Triangle ABC,
measure angle A+measure angle B+measure angle C=180 degree
Therefore the equation for statement number 2 is measure angle A+measure angle B+measure angle C=180 degree
3] In Triangle ABC,
Now substituting the value of angles we get,
Therefore the equation for statement number
4] After solving the equation 2 we get,
Therefore value of