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
Given a square with the length of one side is 8cm and an isosceles triangle with the length of its base is 12 cm . If the area of the square equal of the area of the isosceles triangle then is the length of height of the isosceles triangle ?
M.n ơi kb vs mk nha ! Mk là thành viên ms nên chưa có bn !
Girl 2k5 -FA
Given a triangle ABC. D is a point on AB and E is a point on AC so that DE//BC and \(\frac{BC}{DE}=\sqrt{2}\), F is a point on BC and G is a point on AB so that FG//AC and \(\frac{AC}{FG}=\sqrt{2}\), H is a point on BC and I is a point on AC so that HI//AB and \(\frac{AB}{HI}=\sqrt{2}\). FG meets HI at X, DE meets HI at Y and DE meets FG at Z.
i) Prove that \(DY=ZE\)
ii) Find the exactly value of the ratio \(\frac{YZ}{BC}\)
Dịch bài toán sau và giải :
"Give a right triangle ABC (Â=90) with B =40 and the line d is a the midperpendicular of the segment BC . Suppose that d AB = {E} , E of the segment BC . If BE=16 cm then the area of ABC is ... cm^2.
(round to three demical places in each step)
A . 256
B . 147,95
C . 128
D . 295,9
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.
The triangle ABC has \(AB=24cm\). If D is on the line segment AC such that \(\widehat{ABC}=\widehat{BDC}\)and \(AD=7cm;DC=9cm\)then what is the length of BD?
On the number line, point A has coordinate -6 and point B has coordinate 6.
Suppose that pointC is the midpoint of A,B then C's coordinate is ...
Giúp mình làm các câu hỏi này nha: (càng nhiều càng tốt!)
1. Tiffany and Ryan deposit some amount in a joint bank account such that total balance remains 500. If amount deposited by Tiffany and Ryan are plotted as a linear graph on xy plane, find the area between this graph and the coordinate axis.
2.A group of workers is paving a road. If they pave 200m of the road a day, they will need 3 more days. to finish the work. If they pave 240m of the road a day, they will finish the work 2 days in advance. How long is the road, in meter?
3. Mrs. Darlie has a silver ring, a golden ring and a diamond ring. She put them on her left hand. Each ring can be on any of the five fingers. When there are two or three rings on the same finger, if the order in which they are put is different, that couunt as a different way. How many different ways for Lea to put these rings?
4. Let P(x) be a polynomial with degree 3 such that P(1)=3, P(2)=3, P(3)=7, P(4)=21. Find the value of P(5).
Giúp mình làm các câu hỏi này nha: (càng nhiều càng tốt!)
1. Tiffany and Ryan deposit some amount in a joint bank account such that total balance remains 500. If amount deposited by Tiffany and Ryan are plotted as a linear graph on xy plane, find the area between this graph and the coordinate axis.
2.A group of workers is paving a road. If they pave 200m of the road a day, they will need 3 more days. to finish the work. If they pave 240m of the road a day, they will finish the work 2 days in advance. How long is the road, in meter?
3. Mrs. Darlie has a silver ring, a golden ring and a diamond ring. She put them on her left hand. Each ring can be on any of the five fingers. When there are two or three rings on the same finger, if the order in which they are put is different, that couunt as a different way. How many different ways for Lea to put these rings?
4. Let P(x) be a polynomial with degree 3 such that P(1)=3, P(2)=3, P(3)=7, P(4)=21. Find the value of P(5).
1. on the mp had 11 straight line double-1 ko in parallel C/m: 2 straight line created with each 1 degree17 < corner
2. For (O) the diameter AB. C in addition to line segment AB (C lies on the straight line AB). 2 guystangential CE and CF AB cut EF at I, the cat onlineCMN. C/m: AIM angle = angle of BIN
3. For triangle ABC outreach circle (O). Know D, E, F isthe next point, D in AC, AB, F E in B.C. Know OE = r,AB = c, AC = b, BC = a
C/m: a) 1 (a + b + c) * r = 2S (S is the area of triangle ABC)
b) if (a + b + c) (a + b-c) = 4S, the triangle ABC square
