SAT Math 2.5 Geometry and Measurement

SAT Math 2.5 Geometry and Measurement

Additional Topics in MathCongruence and similarity
GeometryTriangles
PolygonsPerimeter
Product TypeSAT Math
SAT MathGeometry and Measurement
TrianglesSimilar Triangles
Types of Triangles

Transcript

00:27

So…we have to leave out a smaller hunk of cheese to catch that mouse who’s been running

00:31

around our office like he owns the place…

00:33

Okay, our cheese triangle needs a downgrade. Now… because we’re told that CD is parallel

00:37

to BE, we know that triangles ABE and ACD are similar.

00:42

We’re also told that ACD is an isosceles triangle… and because all similar triangles

00:47

maintain the same proportions, we know that ABE is isosceles as well.

00:52

And THAT means that sides AD and AC are equal.

00:58

We can subtract the 6 they give us from 16 to get a side length

01:01

for AB of 10… which is also the length of AE.

01:06

And it’s mere addition from here to get our perimeter… 10 plus 10 plus 8 is 28…

01:10

…Answer is B. As in “brie.”