ACT Math 2.3 Plane Geometry
ACT Math: Plane Geometry Drill 2, Problem 3. What is the perimeter of the object in the video?
|ACT Math||Plane Geometry|
|ACT Mathematics||Plane Geometry|
|Foreign Language||Arabic Subtitled|
Properties of plane figures
|Product Type||ACT Math|
We are being asked for the perimeter, which is the distance all the way around…
...so we are just going to add a bunch of numbers together.
And we can fill some in... this line is the same length as this line so we can label it
with a "3"... this line is the same distance as that line so we can put a "5" here...
So all that's left is figuring out this line. We know the height is 6 because of this
4 and this 2...
...so we can subtract this 4 from 6... and we know that this line is also 2.
Now we just add the numbers -- and we have 4 plus 3 plus 2 plus 5 plus 4 plus 5 plus
2 plus 3... is 28.
The answer is B.