Elements of a Parallelogram

 Elements of a Parallelogram

In figure a Parallelogram ABCD. 

There are four sides AB, BC, CD and DA and four angles ∠A, ∠B, ∠C and ∠D in a Parallelogram.

AB and DC are opposite sides, and AD and BC are another pair of opposite sides.

∠A and ∠C are a pair of opposite angles, and another pair of opposite angles are ∠B and ∠D.

AB and BC are adjacent sides, and another pair of adjacent sides are BC and CD. AD and DC are adjacent sides DA and AB are also adjacent sides.

∠A and ∠B are adjacent angles. ∠B and ∠C, ∠C and ∠D, and ∠D and ∠A are also adjacent angles.

AC and BD are diogonal’s of parallelogram ABCD.

Related posts:

  1. Theorem – In a parallelogram, opposite angles are equal
  2. If each pair of opposite sides of a quadrilateral is equal, then it is a parallelogram
  3. AAS Congruence Rule
  4. What is a Rhombus Definition – Properties
  5. Theorem – The line segment joining the mid-points of two sides of a triangle is parallel to the third side.
  6. Area of a Triangle – Geometry – Problems with Solutions
  7. Two triangles on the same base (or equal bases) and between the same parallels are equal in area
  8. The side opposite to equal angles of a triangle are equal
  9. Supplementary and Complementary Angles
  10. Types of quadrilaterals – Definition – Properties

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