ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
SAT Math: Working Backwards from a Given Arc Length to Find a Circle's Diameter 5 Views
Share It!
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
Full Transcript
- 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
Up Next
The figure above is a square with a side length of . What is the length of ?
Related Videos
If sin[(18d + 12)°] = cos[(7d – 22)°], what is the value of d?
In triangle ΔXYZ, angle Y measures 90°. If , what is the measure of angle Z?
SAT Math 2.1 Geometry and Measurement. What is the measure of angle z in terms of x and y?