ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos


Mathematics and Statistics Assessment Videos 200 videos

TSI Math: Calculating the Volume of a Cardboard Box
6 Views

A cardboard box measures 12 inches wide, 8 inches across, and 6 inches tall. What is its volume in cubic feet?

TSI Math: Solving for a Triangle's Area Using the Pythagorean Theorem
13 Views

An isosceles triangle has legs 10 units long and a base 12 units long. What is its area in square units?

TSI Math: Using Circumference to Calculate a Circle's Area
48 Views

A circle has an area of 225π square units. What is its circumference?

See All

TSI Math: Working Backwards from the Midpoint Formula to Find an Endpoint 13 Views


Share It!


Description:

Point B is the midpoint of segment AC. The coordinates of A are (-9, 3) and the coordinates of B are (2, -3). What are the coordinates of C?


Transcript

00:03

Okay yes i mash bumpers another one up for you

00:06

On the coordinate plane point b is the midpoint of

00:08

segment A c coordinates of a r negative nine Three

00:12

The coordinates of b r two Negative three one of

00:15

coordinates of c We'll be is in the middle of

00:20

a c right there That's Why it's the midpoint Consider

00:23

the x and y coordinates separately So the ex coordinative

00:27

et is negative Nine The exporting and b is two

00:29

there's a horizontal distance They're of two minus negative nine

00:33

or eleven units between two points If we moved another

00:37

eleven units to the right well then we'd arrive at

00:39

the x coordinate of c rights We have two plus

00:43

eleven and thirteen so the x coordinate of sea is

00:46

thirteen So well now we'll do the same thing with

00:49

the y coordinates and get a cz Why coordinate up

00:52

three there Two b's Why coordinate of negative three We

00:55

need to move down three minus three that six units

00:59

moving over six units down to arrive at the negative

01:02

three months Six Well that's negative nine So sees why

01:05

coordinate their so put x and y coordinates back together

01:09

and we see that sea is located at the point

01:11

Thirteen negative nine and a is the answer Yeah we're 00:01:15.972 --> [endTime] shmoop

Related Videos

Revising a Letter by Adding Transitions
147 Views

Which is the best way to revise and combine sentences 1 and 2?

TSI Writing: Adding a New Sentence to Improve a Letter's Structure
27 Views

Where would the following sentence best be placed?

TSI Writing: Choosing the Best Introductory Transition
18 Views

Which of the following is best to insert at the beginning of sentence 8?

TSI Writing: Shifting a Letter's Structure to Improve the Organzational Flow
8 Views

Which is the best location for sentence 9?

TSI Writing: Choosing the Most Effective Sentence Structure
15 Views

Which of the following sentences is best to insert between sentences 11 and 12?