27 tháng 11 2023 lúc 19:06
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27 tháng 11 2023 lúc 19:15
true or false 1, If Ox and Oy are opposite rays then widehat{xOy180^o}2,If Ox and Oy are parallel then widehat{xOy}180^o or widehat{xOy}0^o3, If widehat{xOy}90^o then widehat{xOy} is a straight angle4, If widehat{xOy} +widehat{yOz}180^o then widehat{xOy} and widehat{yOz} are complementary5, If widehat{xOy} is larger than widehat{xOz} then widehat{xOz} is an acute angle6, the lagest angle which is form by two rays is an obtuse angle7, Two acute angles cannot be supplementary8,widehat{xOy} and wi...
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true or false
1, If Ox and Oy are opposite rays then \(\widehat{xOy=180^o}\)
2,If Ox and Oy are parallel then \(\widehat{xOy}=180^o\) or \(\widehat{xOy}=0^o\)
3, If \(\widehat{xOy}=90^o\) then \(\widehat{xOy}\) is a straight angle
4, If \(\widehat{xOy}\) +\(\widehat{yOz}=180^o\) then \(\widehat{xOy}\) and \(\widehat{yOz}\) are complementary
5, If \(\widehat{xOy}\) is larger than \(\widehat{xOz}\) then \(\widehat{xOz}\) is an acute angle
6, the lagest angle which is form by two rays is an obtuse angle
7, Two acute angles cannot be supplementary
8,\(\widehat{xOy}\) and \(\widehat{yOz}\) are adjacent
9, if \(\widehat{xOy}\) and \(\widehat{zOy}\)are supplementary then one of them must be an obtuse angle
10,if \(\widehat{xOy}\) and \(\widehat{yOz}\) are adjacent then \(\widehat{xOy}\) > \(\widehat{xOz}\)
11, If Ox lies between Oy and Oz then \(\widehat{xOy}\) and \(\widehat{yOz}\) are adjacent
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
given an angle xOy(xOy<90),the point A is on the Ox ray and the point B is on the Oy ray such that OA=OB, the point C is on the Ax ray anh the point D is on the By raysuch that AC=BD. If AD=7cm then BC=.....cm
A, if a is real number ,then a is ... Number or ...number.
B, if b is irrational, then b is written in the from of...
Fill in the blank with the suitable number (Note: write decimal number with the dot between number part and fraction part. Example: 0.5)Question 1:Given .Calculate: .Question 2:Given two triangles and .If and then .Question 3:Suppose that is directly proportional to with the scaling factor is .If and then k.Question 4:In this figure, find the value of ?Answer: .(write your answer by decimal in simplest form)Question 5:Find the value of ?Answer: .(write your answer by decimal in simplest f...
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Fill in the blank with the suitable number (Note: write decimal number with "the dot" between number part and fraction part. Example: 0.5)
Question 1:
Given .
Calculate: .
Question 2:
Given two triangles and .
If and then .
Question 3:
Suppose that is directly proportional to with the scaling factor is .
If and then k=.
Question 4:
In this figure, find the value of ?
Answer: .
(write your answer by decimal in simplest form)
Question 5:
Find the value of ?
Answer: .
(write your answer by decimal in simplest form)
Question 6:
Given two triangles and .
If and then the perimeter of is .
Question 7:
In this figure, .
Question 8:
The value of .
(write your answer by decimal in simplest form)
Question 9:
The perimeter of a triangle is and the sides of its are in a ratio of .
Then the sides's length of the triangle are .
(write your answer from least to greatest and used ";")
Question 10:
Fill the suitable number in the "?".
Answer: .
giúp mik vs nha please
Given two adjacent angles AOB and BOC. The sum of measure of them is equal to 160o and the measure of angle AOB is equal to 7 times the measure of angle BOC
a)Find the measure of each angle
b)Inside angle AOC, draw ray OD such that angle COD=90o. Prove that OD is the bisector of angle BOA.
c)Draw the opposite ray OC' of ray OC. Find the measure of 2 angles AOC and BOC' then compare them
Given two adjacent angles AOB and BOC. The sum of measure of them is equal to 160o and the measure of angle AOB is equal to 7 times the measure of angle BOC
a)Find the measure of each angle
b)Inside angle AOC, draw ray OD such that angle COD=90o. Prove that OD is the bisector of angle BOA.
c)Draw the opposite ray OC' of ray OC. Find the measure of 2 angles AOC and BOC' then compare them
1 tháng 12 2023 lúc 20:26
Given 4 points A, B, C, D on a ray such that A lies between B and C; B lies between C and D; OA = 7cm, OD = 3cm, BC = 8cm and AC =3.BD. What is the length of AC