Miary kątów w równoległobokach - Matematyka Szkoła Podstawowa i Gimnazjum

In this video, I show how to determine the measures of angles in a parallelogram and a rhombus. I teach how to use two basic properties of angles in a parallelogram: the equality of opposite angles and the fact that adjacent angles on the same side add up to 180 degrees. I present a method for calculating all angle measures in a parallelogram based on one given angle, and I solve an example with an adjacent angle that leads to finding all the remaining angle measures in the figure. Contents: 1. Properties of angles in a parallelogram 2. Properties of angles in a rhombus 3. Equality of opposite angles 4. Sum of adjacent angles on the same side 5. Finding missing angles based on one given angle 6. Calculating an angle using an adjacent angle 7. Applying the rules to solve a problem involving a rhombus 8. Summary of the angle properties in parallelograms and rhombuses Find more in the playlist: [   • GEOMETRIA NA PŁASZCZYŹNIE  ](   • GEOMETRIA NA PŁASZCZYŹNIE  ) EASY ACCESS to all my math lessons is available on my website: [www.matmagwiazdy.pl](http://www.matmagwiazdy.pl) On this channel, you will find the complete course – 100% of the lessons – in Mathematics for Primary School, High School, and Technical School. Good luck :) Tomasz D. Gwiazda **CHAPTERS** 0:00 Introduction to the properties of angles in parallelograms and rhombuses 0:34 Properties of angles in a parallelogram 1:19 Equality of opposite angles in a parallelogram 1:43 Sum of adjacent angles on the same side in a parallelogram (complementary to 180 degrees) 2:58 Example 1: Calculating angle measures in a parallelogram when one angle is known 4:22 Example 2: Calculating an angle in a parallelogram based on an adjacent angle 5:35 Properties of angles in a rhombus 6:15 Applying the rules to solve a problem with a rhombus 7:20 Summary of the rules concerning angles in parallelograms and rhombuses