156 Answered Questions for the topic Circles

10/17/19

#### 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?

10/06/19

#### 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

07/12/19

#### 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

05/03/19

#### 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

04/29/19

#### 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

04/14/19

What isÂ ?

03/22/19

#### 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

03/14/19

#### 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

02/18/19

#### Find the measure of arc length ab

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

02/18/19

#### Find the measure of arc length ab.

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

02/18/19

#### 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.

02/04/19

#### 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

01/14/19

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

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

12/21/18

#### 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

10/12/18

#### 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

09/11/18

#### 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

09/09/18

#### 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?

08/25/18

#### 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.

08/20/18