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Geometry and Measurement Videos 87 videos

SAT Math 1.1 Geometry and Measurement
719 Views

SAT Math 1.1 Geometry and Measurement. What is the circumference of the circle?

SAT Math 1.2 Geometry and Measurement
246 Views

SAT Math: Geometry and Measurement Drill 1, Problem 2. If A = (0, 4), B = (-3, 2), and C = (1, 0), which point is in the interior of angle ABC?

SAT Math 1.3 Geometry and Measurement
231 Views

SAT Math 1.3 Geometry and Measurement. Find the length of CE.

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SAT Math 8.3 Geometry and Measurement 201 Views


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Description:

SAT Math 8.3 Geometry and Measurement

Language:
English Language

Transcript

00:02

Here’s your shmoop du jour, brought to you by supplementary angles.

00:07

It must be that lotion they’ve been using that makes them so supple…mentary.

00:14

Find the sum of angles N and O in terms of n.

00:21

Here are the potential answers...

00:26

Okay, so we’ve got this poor triangle, which is apparently being dragged along by a string…

00:31

All righty, so… we want to know the sum of the angles N and O…

00:36

in terms of angle…little n.

00:39

The “sum” part is important.

00:42

What that tells us is that we don’t need to figure out what N and O are individually…

00:47

…just what they equal, in relation to angle little n…together.

00:51

Well, the first thing we can figure out is the measure of angle M.

00:56

Since it’s adjacent to angle little n, and the two angles exist along a straight line…

01:01

…they are referred to as supplementary…

01:04

…meaning they total 180 degrees.

01:09

We also know that the three angles inside the triangle must total 180 degrees…

01:15

…so we can deduce that N and O combined… must make up the difference.

01:21

If M = 180 minus little n…

01:24

…and the sum of N and O equal 180 minus M…

01:28

…then we can plug the value for M into our new equation, and cancel out the 180’s…

01:32

…to find that angles N and O are equal to the measure of angle little n.

01:37

Boom…it's answer A.

01:38

Uh oh… the Triangle Humane Society just called. Better run, kid…

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