how can we say that angles of a triangle are 180 without giving any measurement and that should not be a equilateral triangle
sweety70:
no...i think we had a proof to show that sum of all angles are 180 in a triangle without mentioning it as a equilateral triangle
post one more question, proof the theorem sum of three angles in a triangle is 180degree or two right angles
yeah.......sure....
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By angle sum property we can say that sum of the angles of a triangle are 180°.
If it is an equilateral triangle then all its sides are equal and alk angles are 60°.
If it is an equilateral triangle then all its sides are equal and alk angles are 60°.
then
at a we shall get 3 angles and their sum will be equal to 180
mark 1 angle as 1 then 2 and 3
these angles are at point a
ok
so..in the figure angle 1 is equal to angle b and angle 3 is equal to angle c since alternate interior angles
substituting b and c in place of 1 and 3 we get angle b +2 +c =180 and angle 2 is nothing but angle a so we get a+b+c=180
did u get it...??
yes. thank you so much for explaining me
u r wlcm
Answered by
1
Theorem:
In any triangle sum of the three angles are 180 .
if sum of three angles not equals to 180, triangle is not formed
not only equilateral triangle , for any triangle the rule is same
In any triangle sum of the three angles are 180 .
if sum of three angles not equals to 180, triangle is not formed
not only equilateral triangle , for any triangle the rule is same
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