Video Six: Area of Triangles

Video Six: Area of Triangles

Author: Shelly Hicks
See More
Try a College Course Free

Sophia’s self-paced online courses are a great way to save time and money as you earn credits eligible for transfer to over 2,000 colleges and universities.*

Begin Free Trial
No credit card required

27 Sophia partners guarantee credit transfer.

245 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 21 of Sophia’s online courses. More than 2,000 colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.


For next day

A Note for Next Day


Next day in class you will be required to get your netbook at the start of the lesson and go to the interactive activity on this website.


Video also on You Tube

Area of Triangles

Area of Triangle

Key Ideas:

Area of triangle is half of base X height

Formula for area of a triangle = left parenthesis b cross times h right parenthesis space divided by 2 space space space o r space space fraction numerator b space x space h over denominator 2 end fraction

We know this because any triangle is really half of a parallelogram.  Have a look at the diagram below to see this connection.