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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II. Read the passage and answer the questions. Circle A, B, or C.The Moon is approximately 384,400 kilometers from the Earth. Its diameter is 3,479 kilometers, about 1/4 the diameter of Earth. The average temperature on the surface of the Moon during the day is 107°C, hot enough to boil water on Earth. During the night, the average temperature drops to −153°C.Because of its smaller size and mass, the gravity of the Moon is about 1/6 the gravity on the Earth. That means that a person who weighs 1...
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II. Read the passage and answer the questions. Circle A, B, or C.
The Moon is approximately 384,400 kilometers from the Earth. Its diameter is 3,479 kilometers, about 1/4 the diameter of Earth. The average temperature on the surface of the Moon during the day is 107°C, hot enough to boil water on Earth. During the night, the average temperature drops to −153°C.
Because of its smaller size and mass, the gravity of the Moon is about 1/6 the gravity on the Earth. That means that a person who weighs 180 pounds on Earth would only weigh 30 pounds if measured on the Moon. The force of gravity from the Moon affects Earth. Its gravity reaches Earth and pulls the oceans toward the Moon, causing the tides. The gravity from the Sun also affects the tides. The highest tides will always occur when the Moon and Sun are aligned. That is when there is a New Moon or a Full Moon.
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?
“its” in paragraph 2 refers to which of the following?
“aligned” is closest in meaning to which of the following?
A. combined together B. arranged in a line C. affected by the other
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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
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Two points A and B are on the same side of line d. The distance from A to d is 10cm, the distance from B to d is 16cm. Calculate the distance from the midpoint C of AB to d.
Let ABC be an isoceles triangle (AB = AC) and its area is 501cm2. BD is the internal bisector of the angle ABC (D ∈ AC), E is a point on the opposite ray of CA such that CE = CB. I is a point on BC such that CI = 1/2 BI. The line EI meets AB at K, BD meets KC at H. Find the area of the triangle AHC.
bái phục giờ vẫn còn thi toán tiếng anh á ghê á nha
thi xog cấp tỉnh là vứt luôn nhác thi lắm luôn
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27 tháng 11 2023 lúc 20:30
true or false
1, there is only one midpoint for any given line segment
2, if AB+BC=AD then B lies between A and D
3, if AB+BC=AC then B is the midpoint of AC
4, If C is the midpoint of AB then AC=BC
5, if B belongs to Ox, A belongs to Oy, Ox and Oy are opposite then O is the midpoint of AB
1: false
2: False
3: False
4: True
5: False
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27 tháng 11 2023 lúc 19:06
true or false
1, there is only one midpoint for any given line segment
2, if AB+BC=AD then B lies between A and D
3, if AB+BC=AC then B is the midpoint of AC
4, If C is the midpoint of AB then AC=BC
5, if B belongs to Ox, A belongs to Oy, Ox and Oy are opposite then O is the midpoint of AB
23 tháng 3 2022 lúc 22:00
Circle O has diameters AB and CD perpendicular to each other. AM is any chord intersecting CB at N.I is the center of the circle inscribed in triangle AMB. Prove that M, I, D are collinear points
30 tháng 8 2020 lúc 15:29
The area of triangle ABC is 300 . In triangle ABC, Q is the midpoint of BC, P is a point on AC between C and A such that CP = 3PA . R is a point on side AB such that the area of \(\Delta\)PQR is twice the area of \(\Delta\)RBQ . Find the area of \(\Delta\)PQR
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
For Xoy right angle, point A on Ox ray, ray Oy.lay point B on point E on the beam of rays Ox, point F on the beam of rays Oy puzzle that OE = OB, OF = OA.
a, prove that AB = EF and EF square AB
b, Call M, N wrong turn is the midpoint of AB and EF. Prove that triangle square omn weight
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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Let ABC be an isoceles triangle (AB = AC) and its area is 501cm2. BD is the internal bisector of the angle ABC (D ∈ AC), E is a point on the opposite ray of CA such that CE = CB. I is a point on BC such that CI = 1/2 BI. The line EI meets AB at K, BD meets KC at H. Find the area of the triangle AHC.
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