Question

A straight line cuts two other straight lines and the following are the pairs of alternate angles in different
cases. Show in which of these cases the two straight lines are parallel :
(b) 80°, 80°
(c) 579,699
(d) 1199, 1199
aight line cuts two other
(a) 350, 36°​

Answer 1

Answer:

I think its b and d.

Step-by-step explanation:

Alternate angles, when a line cuts through two parallel lines, are said to be congruent i.e. equal. (does not depend on whether the angles are obtuse or acute)

In these cases, the two angles which are equal to each other are shown in

b) 80⁰, 80⁰ and d) 119°, 119°.