[" 23.Prove that: "],[" The sum of the three angles of a triangle is "180^(@)" ."]

Prove that the sum of the three angles of a triangle is 180^0dot

Theorem 6.7 : The sum of the angles of a triangle is 180º

We prove the statement "sum of interior angles of a triangle is 180^@ " by

Prove that the sum of two consecutive angles of a parallelogram is 180^(@).

Prove that the sum of two consecutive angles of a parallelogram is 180^(@).

State whether the following statement is true or false: The sum of the interior angles of a triangle is 180^@ .

Solve the following: In an isosceles triangle, the base angles are equal. The vertex angle is 40^@ . What are the base angles of the triangle? (Remember, the sum of three angles of a triangle is 180^@ ).