Question

proof of all the six theorems

1. if two lines intersect, vertically opposite angles are equal.

2. the sum of the angles of a triangle is 180°

3. the angles opposite to equal sides of a triangle are equal.

4. the diagonal divides a parallelogram into two congruent triangle.

5. equal chords of a circle subtend equal angles at the centre.

6. the angle subtended by an arc at the centre is double the angle subtended by it at any point on the remaining part of the circle.
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Answer 1

depression in the divided into two kindly triangle are equal chords of a circle and are all the angles of part of the

Answer 2

Answer:

1st true 2nd false 3rd true 4th true 5th false 6th true