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Measurement and Geometry Videos 30 videos

CAHSEE Math 1.1 Measurement and Geometry
203 Views

CAHSEE Math Measurement and Geometry: Drill Set 1, Problem 1. What was Jenny's approximate average speed in feet per second?

CAHSEE Math 1.2 Measurement and Geometry
191 Views

CAHSEE Math Measurement and Geometry: Drill Set 1, Problem 2. Convert the value to meters per second.

CAHSEE Math 1.3 Measurement and Geometry
190 Views

CAHSEE Math Measurement and Geometry: Drill Set 1, Problem 3. What is the measurement in degrees, minutes, and seconds?

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CAHSEE Math 5.2 Measurement and Geometry 187 Views


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Description:

Measurement and Geometry Drill 5 Problem 2. What is the area of the triangle?

Language:
English Language

Transcript

00:03

Here’s a question for you to shmoop ‘til you’re blue in the face…

00:07

A triangle is formed by connecting the points A(-3, 2), B(11, 2), and C(4, 7) on the coordinate grid.

00:16

What is the area of the resulting triangle?

00:19

And here are the potential answers...

00:26

This question is testing our ability to, well, draw...

00:29

…and also whether we can just calculate area with some complex inputs.

00:34

So we should know that the formula for area of a triangle is base times height divided by 2, right?

00:40

If we don’t, we may want to take extreme measures to commit it to memory …

00:48

So draw the triangle and we have negative 3 positive 2, 11, 2 and 4, 7… there we go...

00:55

Here we can see that the base is given by this area – and we can count that it’s

00:59

14 units… and the height is 1 2 3 4 5.

01:03

So we just plug in the numbers to the formula and we get 14 times 5 over 2 or.. 35.

01:11

Answer: C.

01:13

As in, “Cubism.”

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