Question

Imp. Thorems in quad. Chap. For class nine plss​

Answer 1

Answer:

Theorem 1: A diagonal of a parallelogram divides it into two congruent triangles.

Theorem 2: In parallelogram, opposite sides are equal.

Theorem 3: If each pair of opposite sides of a quadrilateral is equal, then it is a parallelogram.

Theorem 4: In a parallelogram, opposite angles are equal.

Theorem 5: If in a quadrilateral, each pair of opposite angles is equal, then it is a parallelogram.

Theorem 6: The diagonals of a parallelogram bisect each other.

Theorem 7: If the diagonals of a quadrilateral bisect each other, then it is a parallelogram.

Theorem 8: A quadrilateral is a parallelogram if a pair of opposite sides is equal or parallel.

Theorem 9: The line segment joining the mid-point of two sides of a triangle is parallel to the third side.

Theorem 10: The line drawn through the mid-point of one side of a triangle parallel to another side bisects the third side.

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Answer 2

Answer:

Hey dude!!

Here is your answer!

Theorem : If each pair of opposite sides of a quadrilateral is equal, then it is a parallelogram. ... Theorem : If in a quadrilateral, each pair of opposite angles is equal, then it is a parallelogram. 4. The diagonals of a parallelogram bisect each other.

Thank you ☺️❤️