Чотирикутники

Чотирикутник та його елементи

1. https://www.youtube.com/watch?v=VOOzVhv0F38
2. https://www.youtube.com/watch?v=HZz9m0bEfos
3. https://www.youtube.com/watch?v=ds2S1AdJGss

Паралелограм. Властивості паралелограма

1. https://www.youtube.com/watch?v=6Yq7RwiJnzo
2. https://www.youtube.com/watch?v=PgLK7-DYEUA
3. https://www.youtube.com/watch?v=IEygItP-S94

Ознаки паралелограма

1. https://www.youtube.com/watch?v=JDMso20qB4w
2. https://www.youtube.com/watch?v=wvW5zBJVAZ0
3. https://www.youtube.com/watch?v=UMYQL06O2uU

Прямокутник

1. https://www.youtube.com/watch?v=O-Hnr05NtQg
2. https://www.youtube.com/watch?v=xPB7kk4QEt8
3. https://www.youtube.com/watch?v=jCrjySwpW4A
4. https://www.youtube.com/watch?v=vrDZ_b2nvus

Ромб

1. https://www.youtube.com/watch?v=KvJ-AVv1OIA
2. https://www.youtube.com/watch?v=vvpcKfi5SSk

Квадрат

1. https://www.youtube.com/watch?v=OaRRPa0mQSg
2. https://www.youtube.com/watch?v=ml3ifrZ60hs

Середня лінія трикутника

1. https://www.youtube.com/watch?v=3wKPkYrPuBg
2. https://www.youtube.com/watch?v=D-W6knefMnU

Трапеція

1. https://www.youtube.com/watch?v=8ccQ0ceCMWQ
2. https://www.youtube.com/watch?v=Fyg7M7HZ4hk
3. https://www.youtube.com/watch?v=ROIdpHyciJA

Центральні та вписані кути

1. https://www.youtube.com/watch?v=tN7awaLppEo
2. https://www.youtube.com/watch?v=IqPdtp51clg
3. https://www.youtube.com/watch?v=UdFVjFjal-g
4. https://www.youtube.com/watch?v=T13RUf_sN2Y

Описане та вписане кола чотирикутника

1. https://www.youtube.com/watch?v=sdLYThRe3Hw
2. https://www.youtube.com/watch?v=n_A0_Fkh2_s
3. https://www.youtube.com/watch?v=BQ35iP7THbY