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Angle Congruence Videos 4 videos

ACT Math 5.3 Plane Geometry
289 Views

ACT Math: Plane Geometry Drill 5, Problem 3. What is the measure of Angle GHJ?

ACT Math 1.2 Plane Geometry
369 Views

ACT Math: Plane Geometry Drill 1, Problem 2. In the following diagram, what does Angle 2 measure?

Math Basics: Unit 6.4 Similar Figures
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This video explains similar figures and how to figure out if two shapes are similar using sides and angles. Plus, it discusses how to use one shape...

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ACT Math 1.2 Plane Geometry 369 Views


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Description:

ACT Math: Plane Geometry Drill 1, Problem 2. In the following diagram, what does Angle 2 measure?

Language:
English Language

Transcript

00:02

Gettin' shmoopy with it...

00:05

In the following diagram, lines A and B are

00:07

parallel. Line C is perpendicular. Angle 4 measures 105°.

00:12

What does Angle 2 measure?

00:13

And here are the potential answers...

00:17

OK so what is this question asking?

00:19

Yeah -- line D... and the measurement of Angle 4... are total decoys.

00:23

All we need to recognize is that, because C is perpendicular to A...

00:28

...All of the angles located at the intersection of those two lines will be 90 degrees.

00:34

In fact, that little square thingy tells us the same thing... that we're dealing with right angles.

00:39

So our answer is C.

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