156 Answered Questions for the topic Circles


Where do I start?

Let A be the area of a circle with radius r. If dr/dt=3, find dA/dt when r=5.So I know to use the equation A=(pi)r^2 but, I don't know where to go from there. Do I plug in 5 for r and solve?


Find an equation of the circles:(there are 6 questions)

a)With center (0, 5); passes through (0, 0)b)Radius 4, tangent to x-axis; contain (–5,8)c)Center on line x=3, tangent y-axis at (0, 5)d)With center (–2, 0); passes through (2, 0)e)Radius 5, tangent... more


How to find Chord from Arc Length and Sagitta

I am trying to find the formulas to solve the entirety of a circle segment but all I have are the arc length and the sagitta. From this can I solve for Θ or chord length? EX: I have a arc length of... more


Measurement of an arc

What is measurement of arc ABC where arc AB equals Y degrees, and arc BC = 1 1/2 X -Y degrees


How would I find the diameter of the second/larger marble?

2 marbles fit exactly, lengthwise, into a container. The smaller has a diameter of 4 cm and sits on the bottom of the jar. The larger marble sits next to the smaller one, touching both the smaller... more


Help... extra practice

What is ?


How do I find the length of an arc with coordinates?


Circle diameter and revolution

A wheel of a compact car has a 25-inch diameter. The wheel of a pick up truck has 31-inch diameter. To the nearest inch, how much further does the pick up truck wheel travel in one revolution than... more


pizza problem s

The large pizza from pet’s has a diameter of 16 inches and costs $14.99 the large pizza at Gino’s is 18 inches in diameter and costs 16.49 which pizza costs more per area


Find the measure of arc length ab

A circle with a radius of 7 and a chord measure of 12.


Find the measure of arc length ab.

A circle with a radius of 8 and a chord measuring at 10.


FInd the measure of the segment

􏰀M has radius 4.From external point E,a tangent is drawn meeting 􏰀M at T. Line ET has length 1/3 the length of line EM. Find ET.


Circle question-Precalculus

A small radio transmitter broadcasts in a 44 mile radius. If you drive along a straight line from a city 49 miles north of the transmitter to a second city 61 miles east of the transmitter, during... more


Center (6,-5) passing through point (1,7)

Center (6,-5) passing through point (1,7)


Slope of line passing through origin and tangent to circle.

If a line passing through origin touches the circle x2 + y2 - 6x + 8y + 9 = 0, then its slope may be : (1)12/7(2)-12/7(3)24/7(4)-24/7


Question about Circle Theorems. I need help pls!

Inscribed triangle ABC has chords AB and BC subtending angles of 120 degrees and 110 degrees respectively at the circumference of their minor arcs. I need to calculate the angles of the traingle... more


Mathematically, how is the answer 16

Jake put six black checkers in a row, and completely surrounded them with red checkers. If every red checker was touching at least one black checker then what was the minimum number of red checkers... more


How long does the ripple take to reach the boat?

The radius of the ripple increases steadily at 6 cm/sec. A toy boat is floating on the pond, 2.00 m east and 1.00m north. How long does the ripple take to reach the boat?


Find the equation in standard form of the circle with points (2,3), (3,4), (-1,2)

I can't keep up with the solution. I need it for my quiz on tuesday. 


Its about sat

A right cylinder is inscribed in a sphere with radius 10 if radius of circular base of cylinder is 6 what is vol of cylinder
1 3 4 5 6 7

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