75 Answered Questions for the topic Circle

08/25/18

Finding Perimeter and Area on a cross section
I don't really get how cross-section works. So um, this is the problem:   "You cut the cake vertically to make two congruent parts." Image: https://i.imgur.com/QfyZQ8d.png   A) Find the... more
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08/19/18

standard equation of a circle given endpoints of diameter are (-2,3) and (6,-4)
standard equation of a circle given endpoints of diameter are (-2,3) and (6,-4) for my precal assignment, i just want to check my answer:) 
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Circle

08/04/18

Find the standard form for the equation of a circle with a diameter that has endpoints (0,-3) and (1,2)
(x-h)^2+(y-k)^2=r^2
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07/11/18

A sector with central angle θ is cut from a circle of radius R = 24 inches, and the edges of the sector are brought together to form a cone.
A sector with central angle θ is cut from a circle of radius R = 24 inches (see figure), and the edges of the sector are brought together to form a cone. Find the magnitude of θ such that the... more
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06/30/18

what is the general equation for (0,0) with the radius of 5
x2-y2=5
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Circle

06/15/18

The diameter of circle A is the same as the radius of circle B. If the sum of their circumferences is 81pi. What is the diameter of circle B?
Circumference = 2 pi r  
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06/07/18

Write the equation in standard form:
given the following equation of the ellipse in general form, 3x^2+y^2-6x+4y+4=0, complete the square to write the equation in standard form.
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Circle Tangent

05/24/18

Find angle ACB in terms of x using tangent
Angle ABC = xLine BC is tangent to circle centre OLine AOC is a straight lineFind angle ACB in terms of xI got 270-2x:Angle OAB = OBA = x-90Angle ACB= 180-(x-90)-xApperently this is the wrong... more
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Circle

03/28/18

Draw a scaled copy of the circle using a scale factor of 2.
The circle has a radius of 3/4 inches.
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03/19/18

Pi Day Problem
If the top surface of a particular slice of pie is a sector of a circle with a vertex angle measuring 20 degrees and the length of the arc is 3.14π units, what is the perimeter(left in terms of π)... more
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Circle

02/15/18

Find the value of x if ( 60-3x) and (4x-7) are the opposite angles of any cyclic quadrilateral
I am confused by this, and unable to understand this 
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12/15/17

Each side of a regular septagon (7 sides) is 10cm long. What is the radius of the inscribed circle?
 I don't want it done using a formula. I want to learn how to do it using cos, tan, sin or sin(a)/A = sin(b)/B, sin(b)/B=sin(c)/C.
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Circle Equation Area Pi

11/25/17

A fountain is in the shape of a circle.if the fountain has a diameter of 8.8 meter,which equation could be used to find the area of the base of the fountain?
Its an area 
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10/24/17

what are the coordinates of the center and the length of the radius of the circle?
The equation of a circle is x^2+y^2-2x+6y+3=0. What are the coordinates of the center and the length of the radius of the circle.
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Circle

05/19/17

The equation of circle O in (x-5)^2+(y+1)^2=65. Does circle Oncontain the point (-2,3)
The equation of circle O in (x-5)^2+(y+1)^2=65. Does circle Oncontain the point (-2,3)?
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02/26/17

Find the center and the radius of the circle with equation?
x^2+y^2+6x-10y-10=0
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02/26/17

Find the equation of the circle?
a diameter of a circle has endpoints (2,3) and (4,5).
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02/17/17

having doubt on area of circle
we know that the circumference of the circle is 2(pi)r so if we draw lines from each point to the centre then we should get the area of the circle and it should be 2*(pi)*r*r , ;) instead of... more
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Circle

01/27/17

ABC is a triangle inside the circle .D and E are points on AB and AC respectively. AB and AC are two chords of circle whose centre is o. If OD is perpendicular
ABC is a triangle inside the circle .D and E are points on AB and AC respectively. AB and AC are two chords of circle whose centre is o. If OD is perpendicular to AB , OE is perpendicular to AC and... more
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Circle

01/27/17

O is the centre of a circle .chord CD is parallel to diametre AB .if angle ABC =25 ,then calculate angle CED .
Detail of figure - draw a circle with centre o and diametre AB and chord CD parallel to it .through chord CD make an angle CED above centre O of the circle at any point on the circle .
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Circle

01/26/17

two equal chords AB and CD of a circle with centre O .when produced ,meet at a point E .prove that BE = DE and AE= CE
Detail of figure - A circle with centre O and draw two equal chords opposite to centre O with slightly inclined when produced both chords meet at point E outside the circle 
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Circle

01/26/17

a circle with centre O and diameter COB is given .if AB and CD are parallel ,then show that AC chord is equal to chord BD .
Give solution  with proper figure sir please urgent basis 
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Circle

01/26/17

bisector AD of angle BAC of triangle ABC passes through the centre O of the circumcircle of triangle ABC ,prove that AB = AC
Answer it urgently 
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Circle

01/24/17

in a circle angle BAC= 55 Angle BCA = 62 ,the altitude BE produced meets the circle at D find angle ACD, angleDAC andangle ADB
in a circle angle BAC= 55 Angle BCA = 62 ,the altitude BE produced meets the circle at D find angle ACD, angleDAC andangle ADB GIVE SOLUTION URGENT DETAIL OF FIGURE - A TRIANGLE ABC IS INSCRIBED... more
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Circle

01/23/17

on a common hypotenuse ab two right angled triangles acb and adb are situated on opposite sides .prove that angle bac = angle bdc
Answer it urgently please sir step by step 
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