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Angle Measures Videos 13 videos
Unlike anything that enters the Bermuda Triangle, Exterior angles can be found—in more than one way. This video covers how to use the remote inte...
If you bake a pie that's 360 degrees...you should probably let it cool down a little. While you're waiting to ingest all those delicious, delicious...
Math Plane Geometry: Drill 1, Problem 1. What does a straight angle measure?
ACT Math 4.4 Plane Geometry 340 Views
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Description:
ACT Math: Plane Geometry Drill 4, Problem 4. Find the value of x.
- Plane Geometry / Plane figures (triangles, rectangles, parallelograms, trapezoids, circles, polygons)
- Product Type / ACT Math
- Foreign Language / Spanish Subtitled
- Foreign Language / Korean Subtitled
- Foreign Language / Chinese Subtitled
- Foreign Language / Arabic Subtitled
- Plane Geometry / Properties of plane figures
- Plane Geometry / The concept of proof and proof techniques
Transcript
- 00:02
For a good time solve this shmoopy question... Find the value of X?
- 00:06
And here are your options...
- 00:10
Okay, so we just need to find X. First we need to determine the last mystery angle in the quadrilateral
- 00:17
since X in the quadrilateral angle combined to make a straight angle
- 00:21
which is always a 180 degrees. A quadrilateral's
Full Transcript
- 00:24
angles measure 360-degrees so
- 00:27
to find the last angle in the quadrilateral we can take
- 00:31
360 minus the quantity 120 plus 125 plus 55
- 00:36
so 120 plus 125 plus 55 is 300
- 00:40
we get 360 -300 and that's 60
- 00:43
we want X plus 60 equal 180
- 00:46
so we subtract 60 from both sides
- 00:49
and X equals 120. Answer choice D.
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