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Geometry and Measurement Videos 88 videos

SAT Math 1.1 Geometry and Measurement
719 Views

SAT Math 1.1 Geometry and Measurement. What is the circumference of the circle?

SAT Math 1.2 Geometry and Measurement
246 Views

SAT Math: Geometry and Measurement Drill 1, Problem 2. If A = (0, 4), B = (-3, 2), and C = (1, 0), which point is in the interior of angle ABC?

SAT Math 2.3 Geometry and Measurement
267 Views

SAT Math 2.3 Geometry and Measurement. Find the length of AB.

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SAT Math: Working Backwards from a Given Arc Length to Find a Circle's Diameter 5 Views


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Description:

On a circle, measures 6π meters. If this arc is half the distance around the circle, how many meters is the circle's diameter?


Transcript

00:03

Okay it's a trig shmoop er's Here we go Last

00:06

in this series on a circle A c measures six

00:10

py meters If this arc is half the distance around

00:14

the circle how many need er's is the circle's diameter

00:21

Okay Interesting Well how unfortunate that there are no figures

00:25

to which we poor budding mathematicians can refer well it

00:28

doesn't really matter The ark is half the distance around

00:31

the circle So it's half the circumference right So we've

00:35

got point five see equals six pie because they gave

00:40

us that right All right so then the circumference here

00:43

is twelve pie Well now that we have that the

00:45

diameter is easy As what Okay circumference is two pi

00:50

r twelve pi equals two pi r So six is

00:54

are in the diameter is twice the radius right Just

00:56

two are so we can multiply our radius there of

00:59

six by two and we get that the diameter is

01:02

twelve meters Well another way to look at this conference

01:04

formulas to just say that it's pai d instead of

01:07

two pi r because well that's the same thing And

01:10

you got to read all this carefully because they throw

01:13

curve balls at you all the time anyway All right 00:01:15.536 --> [endTime] we're done Yeah

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