Which function represents the upper half of the circle? A. y = √(25 - x^2) B. y = -√(25 - x^2) C. y = 5 - x D. y = x - 5 相关知识点: 试题来源: 解析 A。解析:对于圆的方程 x^2 + y^2 = 25,上半圆的函数表达式为 y = √(25 - x^2),所以选 A。
Different Types of Circles Consider the radius of a circle C: x2+y2+Dx+Ey+F=0 Real Circle (D/2)2+(E/2)2-F>0, r>0 Point Circle (D/2)2+(E/2)2-F=0, r=0 Imaginary Circle (D/2)2+(E/2)2-F<0, r<0
The equation of a circle is given below.Identify the radius and center.Then graph the circle.(x+3)2+(y-1)2=9Radius:口后唱Center:CD×5? 相关知识点: 试题来源: 解析 (+3)2y-1)2=-|||-(x-h24(0H)2=2-|||-ChL)-|||-vodivs=Y-|||-center(-3,1)-|||-2=-|||-Y=3-|||...
1. Find the equation of the circle with(i) Centre at origin and radius 4.(ii) Centre at (-3, -2) and radius 6.(iii) Centre at (2, -3) and radius 5.(iv) Centre at (-3, -3) passing through point(-3,-6) 相关知识点: 试题来源: 解析 (i)x^2+y^2=16(ii)x^2+y^...
for zero (0). Acircleconsists of a closed curved line around a central point. Every point on the line is the same distance from the central point. This distance to the center is called theradius.The outer line that encloses thecircle(or the length of this line) is called the...
The standard equation of a circle, also called the standard form, is (x - h)2 + (y - k)2 = r2. The radius of the circle is r, the center of the circle is (h , k), and (x , y) is any point on the circle.How to write the equation of a circle using the coordinates ...
What is an equation of the circle whose center is (1,3) and whose radius is 2? A: (x + 1) + (y + 3) = 4 B: (x − 1) + (y − 3) = 2 C: x + y = 4 D: (x − 1) + (y − 3) = 4 相关知识点: ...
The radius of a circle is defined as a line segment that joins the center to the boundary of a circle. The distance from the center point to any endpoint on the circle is called the radius of a circle. Learn about the radius formulas with solved examples
Red Write down an equation of the circle with the given centre and radius in each case(1)centre(1, 3)radius 3 (2)centre(4, -6) radius 5 (3)centre(-1, -8) radius v3 相关知识点: 试题来源: 解析 (1)(x-1)^2+(y-3)^2=9(2)(x-4)^2+(y+6)^2=25(3)(x+1)^2+(y...
And that is the "Standard Form" for the equation of a circle!It shows all the important information at a glance: the center (a,b) and the radius r.Example: A circle with center at (3,4) and a radius of 6: Start with: (x−a)2 + (y−b)2 = r2 Put in (a,b) and r:...