State and prove the angle sum property of a triangle.
Dear Student
Angle sum theorem
Since angle a, angle b, and angle c make a straight line,
angle a + angle b + angle c = 180 degrees
Since alternate interior angles are equal, angle a = angle x and angle b = angle y
Therefore, angle x + angle y + angle c = 180 degrees .
Regards
Angle sum theorem
Since angle a, angle b, and angle c make a straight line,
angle a + angle b + angle c = 180 degrees
Since alternate interior angles are equal, angle a = angle x and angle b = angle y
Therefore, angle x + angle y + angle c = 180 degrees .
Regards