Question

1.Once the maths teacher of class 7 told students
that today we will prove that the sum of all three
angles is 180°. As shown in the figure, he told to
draw any triangle ABC in the notebook.
Further side BC was extended to D.
Now teacher said to draw CE parallel to BA .
Further angles were named 1 to 5 as shown in
the figure. Now answer the following questions:
(I) BA parallel to CE and AC is the transverse
line , so <1 is equal to which angle?
(II) <2 is equal to which angle?
(III) What is the value of <3+ <4+<5 ?

Answer 1

Answer:

Step-by-step explanation:

Do you want to prove that sum of truangle is 180° or you want to know the answer of <1+<2+<3.