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Look at the sentences and answer the S
7
the di
questions
KE
a You can go to the swimming pool
b I can play the piano Listen!
c Arrgh! Tom can't sing!
d We can't go into town.
e Can they speak Spanish?
1 Which two sentences are about
permission?
2 which three sentences are about ability?
3 What is the negative form of can?
4 Do we use do and does to make questions
with can?
LANGUAGE FOCUS can for ability and permission
I can talk about things we can and can't do.​

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Ответы на вопрос:

serpgo
serpgo
4,8(57 оценок)

p=S Δ/Sкруга

Sкруга=π·R2

Rописанной окр=a·√3/3 ⇒ a=R·√3

S Δ=(1/2)a2·sin60 ° =a2√3/4=3R2√3/4

p=(3√3)/(4π)

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