ACT Math 1.2 Plane Geometry
ACT Math: Plane Geometry Drill 1, Problem 2. In the following diagram, what does Angle 2 measure?
|ACT Math||Plane Geometry|
|ACT Mathematics||Plane Geometry|
|Congruence||Understand congruence in terms of rigid motion|
|Foreign Language||Arabic Subtitled|
Understand congruence in terms of rigid motions
|Plane Geometry||Parallel and perpendicular lines|
Properties of plane figures
The concept of proof and proof techniques
|Product Type||ACT Math|
OK so what is this question asking?
Yeah -- line D... and the measurement of Angle 4... are total decoys.
All we need to recognize is that, because C is perpendicular to A...
...All of the angles located at the intersection of those two lines will be 90 degrees.
In fact, that little square thingy tells us the same thing... that we're dealing with right angles.
So our answer is C.