Find, circle.
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Find the area of a circle with a radius of 2cm.
Answer: The area of a circle is: ............
Find the area of the circle have the radius of 324,331m.
\(S=324,331\times324,331\times3,14=330298,47634154\left(m^2\right)\)
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=330298,47634154 m2 nha bạn chúc bạn học giỏi
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find the area of equilateral triangle inscribed in a circle of radius 6cm
Xem chi tiết
- Trans: Tìm diện tích tam giác đều nội tiếp đường tròn bán kính 6cm.
Giả sử ta có \(ΔABC \) nội tiếp \(O;6cm)\) và \(AB=AC=BC=x(cm)\)
Xét \(ΔABC\) đều có: \(O\) là trọng tâm tam giác
\(\Rightarrow \dfrac{AO}{AH}=\dfrac{2}{3}\) (H là hình chiếu của A trên BC)
Mà \(AO=R=6cm \Rightarrow AH=9(cm)\)
Áp dụng định lý Pytago vào \(ΔACH\) có:
\(AC^2 =AH^2+CH^2 \\ \Leftrightarrow x^2 = 9^2 + (\dfrac{x}{2})^2 \\ \Leftrightarrow x=6\sqrt{3}\)
\(\Rightarrow S_{ΔABC}=\dfrac{1}{2} AH.BC=\dfrac{1}{2} . 9.6\sqrt3 = 27\sqrt3 (cm^2)\)
Vậy \(S=27\sqrt{3}cm^2\)
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The area of the circle is 47.1cm2. find the area of square?
lấy 47,1 : 3,14 = 15
rồi lấy 15 x 4 vì 15 là diện tích ô vuông nhỏ trong cái hình vuông = 60 cm2
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H24
SGK Global Success
12 tháng 3 2023 lúc 19:51
1. Find and circle the words. Then say.
(Tìm và khoanh tròn từ. Nói)
a. pizza: bánh pizza
b. kitten: mèo con
c. popcorn: bỏng ngô
d. bike: xe đạp
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mona isn't busy today and she could help her mother at hom
there is one mistake in each sentence . Find , circle and correct the mítakes
mona isn't busy today and she could help her mother at hom
could=>can
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The diagram shows a circle and 2 quater circles in a square.
Find the area of the shaded region.
(Take n=3.14)
PP
19 tháng 4 2022 lúc 16:34
A. Circle the word whose underlined part is pronounced differently from that of the othersB. Find the word A, B, C, or D which has different stress pattern in line
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A. Circle the word whose underlined part is pronounced differently from that of the others
B. Find the word A, B, C, or D which has different stress pattern in line
III. Find and circle the mistakes21. He lives in this city for ten years. A B C D22. If you won’t get up now, you will be late for school A B C D23. Although being rich , They are not happy. A B C D24. He asked me why didn’t I believe there was intelligent life on other planets. A B ...
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III. Find and circle the mistakes
21. He lives in this city for ten years.
A B C D
22. If you won’t get up now, you will be late for school
A B C D
23. Although being rich , They are not happy.
A B C D
24. He asked me why didn’t I believe there was intelligent life on other planets.
A B C D
25. John took a bath when we came.
A B C D
1a->has lived
2b->don't
3a->despite
4b->I din't
5a->was taking
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There is one mistake in each sentence. Find, circle and correct the mistake.
59. Children shouldn’t spend too much time to watch television. _______________________________________
60. Many people work hardly every day to produce TV programmes. _______________________________________
61. The 7 o’clock news tell people what is happening in the world _______________________________________
to watch => watching
hardly => hard
tell => tells
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=>watching
=> hard
=> tells
TICK ĐUY :3
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