Given a circle (O) and its diameter AB. C is a point on the circle which is different from A and B. H is the projection of C on AB. I is the midpoint of CH. The line passes through I and perpendiculars with OC cut (O) at 2 points D and E. Prove that \(\Delta CDH\)is an isosceles triangle.
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1. What is the first paragraph mainly about?
A. A comparison between the Moon and Earth B. Physical characteristics of the Moon
C. The effect of the Moon on Earth
2. The word “its” in paragraph 2 refers to which of the following?
A. the Moon’s B. Earth’s C. gravity’s
3. According to the passage, which of the following is true?
A. A person would lose 5/6 of their weight if they were on the Moon.
B. A person would weigh much less on the Moon than on Earth.
C. The Earth weighs six times as much as the Moon.
4. What can we learn about the tides?
A. They happen twice a month at New Moon and Full Moon.
B. The Sun causes higher tides on Earth than the Moon does.
C. They are caused by both the Sun and the Moon.
5. The word “aligned” is closest in meaning to which of the following?
A. combined together B. arranged in a line C. affected by the other
1. What is the first paragraph mainly about?
A. A comparison between the Moon and Earth B. Physical characteristics of the Moon
C. The effect of the Moon on Earth
2. The word “its” in paragraph 2 refers to which of the following?
A. the Moon’s B. Earth’s C. gravity’s
3. According to the passage, which of the following is true?
A. A person would lose 5/6 of their weight if they were on the Moon.
B. A person would weigh much less on the Moon than on Earth.
C. The Earth weighs six times as much as the Moon.
4. What can we learn about the tides?
A. They happen twice a month at New Moon and Full Moon.
B. The Sun causes higher tides on Earth than the Moon does.
C. They are caused by both the Sun and the Moon.
5. The word “aligned” is closest in meaning to which of the following?
A. combined together B. arranged in a line C. affected by the other
Dịch thôi chứ ko bt làm:Diện tích tam giác ABC là 300. Trong tam giác ABC, Q là trung điểm BC, P là một điểm trên AC nằm giữa C và A sao cho CP = 3PA. R là một điểm trên cạnh AB sao cho diện tích của \(\Delta\)PQR gấp đôi diện tích của \(\Delta\)RBQ. Tìm diện tích của\(\Delta\) PQR
ý bạn là thế này hả : mà ray là gì vậ bạn???
Đối với XOY góc bên phải, điểm A trên Ox ray, ray Oy.lay điểm B ở điểm E trên chùm tia Ox, điểm F trên các chùm tia Oy biết OE = OB, OF = OA.
a, chứng minh rằng AB = EF và EF vuông AB
b, Gọi M, N lần lượt sai là trung điểm của AB và EF. Chứng minh rằng tam giác vuông trên ....
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