prove that if two straight lines intersect the adjacent angles are supplementary.
Answers
Answer:
Let us draw the diagram showing two straight lines AB and CD intersecting each other at point O.
(i) When two lines intersect adjacent angles are complementary.
This statement is incorrect.
As the adjacent angles form a linear pair and they are supplementary.
(ii) When two lines intersect adjacent angles are supplementary.
This statement is correct.
As the adjacent angles form a linear pair and they are supplementary.
(iii) When two lines intersect opposite angles are equal.
This statement is correct.
As the vertically opposite angles are equal.
(iv) When two lines intersect opposite angles are supplementary.
This statement is incorrect.
As the vertically opposite angles are equal.
l hope it's help you...
Answer:
its already answered so i will simply explain
Step-by-step explanation:
we know that if 2 straight line intersect adjacent angles lie on a straight line so as angle of straight line =180 degrees the sum of adjacent angles = 180 degrees which is supplementary.