The sum of the three constitutive angles of a planar triangle is always equal to 180 degrees or two right angles. And there are two things in it as well. they are diagonal and a exterior angle
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ACTIVITY:DRAW A TRIANGLE. name it a b c.cut out the corners.place them on a straight line such that they form a straight line.
this proves that sum of a ll angles is =180degrees
hope its helpful.
As long as the sides correspond then yes. The other three are: Side-Side-Side Side-Angle-Side - the angle *MUST* be between the two sides Right angle-Hypotenuse-Side
For all triangles drawn on a plain ( 2-dimensional) surfacem the sum of the three interior angles is 180 degrees. Hence if the sum of two angles is 125 degrees. Then the third angle is 180 - 125 = 55 degrees.
Pythagoras' theorem states that for any right angle triangle its hypotenuse when squared is equal to the sum of its squared sides.
By constructing a right angle triangle whereas its hypotenuse when squared is equal to the sum of its squared sides which is known as Pythagoras' theorem.
Pythagoras was interested in triangles when he found out that for any right angle triangle that when its hypotenuse is squared it is equal to the sum of its two squared sides.