Cho một hình chữ nhật mà chiều rộng của nó là một nửa chiều dài. Tỉ lệ giữa chu vi của hình chữ nhật với chiều rộng của nó là ?
Bài giải:
Gọi chiều rộng là: R; chiều dài là D; Chu vi là CV của hình chữ nhật
Theo đề bài ta có: R=1/2D. Suy ra D=2R
Mà chu vị hình chữ nhật là: CV = (D+R)x2.
Tỉ lệ giữa chu vi của hình chữ nhật với chiều rộng là: CV:R = (2R +R)x2 : R
= 3Rx2:R =6
Đáp án: 6
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
The ratio of the height : width of a flower garden is equal to the golden ratio. The width of the garden is 14 feat. Find the lenght of the garden. Express your answer in simplest radical form and in feet
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 sides of a triangle are a, b and c respectively. What is the perimeter of the triangle if a = 5cm, b = 4cm, and c = 3cm? Answer: The perimeter of the triangle is cm.
If n is divisible by 100 and 4900 < n < 5100 then n =
Question 8:
The perimeter of the square below is cm
(Simplify your answer)
Question 9:
The sum of two numbers is the greatest 4 – digit number and their ratio is 1:2. The smaller number is
Question 10:
If the sum of two numbers is 471 and there are 44 other numbers between the two numbers. Find the greater number.
Answer:
Given a isoseles trapizoid ABCD ( AB paralle CD) AC is perpendicular to BD and the length of the height of the ABCD is 7cm . What is the area of the isoseles trapizoid ABCD ?
I hope to everyone help me to solution this math ! thanks
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
Given an acute triangle ABC, its median AM and its heights BH and CK. The line passes through A and perpendiculars with AM cuts BH and CK at D and E, respectively. Prove that \(\Delta DEM\)is an isosceles triangle.
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).
