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Jaká je hodnota pí zaokrouhlená na 2 desetinná místa?
3,14
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Který bod, nebo které body, náleží kružnici i kruhu?
S_1, C
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Který bod,nebo které body, nenáleží kruhu?
C
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Který bod, nebo které body, náleží kruhu?
A, B, S
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Co vyjadřuje obrázek?
Thaletovu větu
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Co je na obrázku?
středový úhel
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Co je na obrázku?
obvodový úhel
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Co je na obrázku?
sečna
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Co je na obrázku?
vnější přímka
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Co je na obrázku?
tečna
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Co je na obrázku?
sečna
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10
15
20
25
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Co je na obrázku?
kruhová výseč
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Co je na obrázku?
kruhová úseč
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Co je na obrázku?
průměr
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Co je na obrázku?
tětiva
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Co je na obrázku?
průměr
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Co je na obrázku?
poloměr
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Co je na obrázku?
kruhový oblouk
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Co je na obrázku?
kružnice
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Jaký je vzorec středné pro kružnice, které leží uvnitř bez dotyku?
s < r_1 - r_2
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Jaký je vzorec středné pro kružnice, které se protínají?
r_1 - _r_2 < s < r_1 + r_2
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Jaký je vzorec středné pro kružnice, které jsou vně bez dotyku?
s > r_1 + r_2
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Jak se nalezne střed kružnice?
Narýsujeme tětivu, nalezneme její střed z toho uděláme kolmici, tak vznikne nová tětiva, narýsujeme její střed a to je střed kružnice.
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Jak se rýsuje tečna z bodu vně kružnice?
Spojení bodu S a T, nalezení středu úsečky a narýsování Thaletovy kružnice, v průsečíku Thaletovy kružnice a kružnice spojíme s bodem T, to je tečna
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Jaký je vzorec středné pro kružnice s vnějším dotykem?
s = r_1 + r_2
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Jaký je vzorec středné pro kružnice, které mají vnitřní dotyk?
s = r_1 - r_2
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Co je to kruhová výseč?
Kruhová výseč je část kruhu ohraničená dvěma poloměry a kruhovým obloukem.
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Co je to kruhová úseč?
Část kruhu, která je ohraničená tětivou a kruhovým obloukem.
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Co je to vnější přímka?
Přímka, která s kružnicí nemá žádný společný bod.
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Co je to tětiva?
Tětiva je úsečka, která začíná a končí v bodech na kružnici.
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Co je to sečna?
Přímka, která má s kružnicí dva společné body.
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Co je to tečna?
Přímka, která má s kružnicí jeden společný bod.
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Jak se nazývá úsečka, která spojuje středy dvou kružnic?
středná
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Jak se nazývá část kruhu ohraničená dvěma poloměry a kruhovým obloukem?
kruhová výseč
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Jak se nazývá část kruhu ohraničená tětivou a kruhovým obloukem?
kruhová úseč
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Jak se nazývá úsečka, která je určena dvěma body na kružnici?
tětiva
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Jak se nazývá přímka, která nemá s kružnicí žádný bod dotyku?
Vnější přímka
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Jak se nazývá přímka, která má s kružnicí jeden bod dotyku?
Tečna
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Jak zní Thaletova věta?
Všechny obvodové úhly sestrojené nad průměrem kružnice jsou vždy pravé.
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Jaký je vztah mezi středovým a obvodovým úhlem?
Středový úhel je dvojnásobek obvodového úhlu.
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Čím je ohraničen půlhkruh?
Půlkruh je ohraničen průměrem a kruhovým obloukem (půlkružnicí)
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Jaký je rozdíl mezi kruhovou úsečí a kruhovou výsečí?
Kruhová úseč je ohraničena tětivou a kruhovým obloukem, kruhová výseč je ohraničená dvěma poloměry a kruhovým obloukem.
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Jaký je rozdíl mezi sečnou a tětivou?
Sečna je přímka a tětiva je úsečka
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Jaký je rozdíl mezi průměrem a poloměrem?
Průměr je dvojnásobek poloměru, poloměr je od sředu k bodu na kružnici a průměr je mezi dvěma body na kružnici a prochází středem kružnice.
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Jaký je rozdíl mezi kruhem a kružnicí?
Kružnice je pouze obrys, kruh je obrys a všechno uvnitř
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Z obrázku urči, které body nenáleží kružnici
B, C, S
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Z obrázku urči, které body náleží kružnici
A
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Jak se vypočítá obsah kruhu?
S = πr^2
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Jak se vypočítá obvod kružnice?
o = 2πr
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Jak se rýsuje tečna z bodu na kružnici?
Spojíme střed s bodem na kružnici a na poloměr narýsujeme kolmici
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Jaký je vzorec středné pro soustředné kružnice?
s = 0
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Co je to středná?
Středná je úsečka, která spojuje středy dvou kružnic.
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Jak se nazývá přímka, která má s kružnicí 2 společné body?
sečna
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Definuj kružnici
Kružnice je množina všech bodů, které mají od středu vzdálenost rovnou poloměru.
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Definuj kruh
Kruh je množina všech bodů, které mají od středu vzdálenost menší nebo rovnou poloměru.
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