Loading...

Lesson: Geometry - 23

Parallelograms

[Page 23 of 30]

A parallelogram is a quadrilateral that has two pairs of parallel sides. The opposite angles are congruent. The diagonals bisect each other.

A parallelogram is a quadrilateral with:

  • Opposite sides parallel
  • Opposite angles equal

These two properties go together: if the opposite angles are equal, the opposite sides will be parallel, and vice versa.

Adjacent angles of a parallelogram are supplementary.

ADC = ∠ ABC

Since quadrilateral ABCD has opposite angles that are equal, it is a parallelogram. That means that AD is parallel to BC, AB is parallel to DC, and ∠DAB = ∠DCB.

Next to display next topic in the chapter.

Test Prep Lessons With Video Lessons and Explained MCQ

Large number of solved practice MCQ with explanations. Video Lessons and 10 Fully explained Grand/Full Tests.

More for You
All in this Category

You may be interested in

Colleges in karachi

A comprehensive list of major colle ...

College Of Excellence For Girls - Hydrabad

A popular name in colleges of Hydra ...

Study in Australian Universities

Austrlian universities and system o ...

PPSC Exam for Posts of ASI

A very attractive job - PPSC Exam f ...

Join Pakistan Air Force

How you can join Pakistan Air Force ...

GRE Bio-Chemistry

Find what is GRE Bio-Chemistry and ...

Social Science Universities

List of universities in the field o ...

BZU - Bahauddin Zakariya University

BZU is a big university in Multan ( ...