Among quadrilaterals parallelograms are really nice shapes which have many useful properties. And those properties always help us solving the problems we meet.
Here is a video on one of the parallelogram problems:
A you see, everything is not that difficult!
Let’s summarize what kind of properties, laws and theorems we have used here:
- Angle bisector bisects angle into 2 congruent parts.
- Alternate interior angles with respect to 2 parallel lines and transversal are congruent.
- If base angles of triangle are congruent, the triangle is isosceles.
- In isosceles triangle the lateral sides are congruent (definition)
- Parts-whole postulate
- Opposite sides of parallelogram are congruent
- Perimeter is the sum of all sides of given shape
Basically, thatțs it. Wish you success in your studies and see you in future videos!
