Area of a Triangle, Given 3 Sides, Heron's Formula

This geometry video tutorial explains how to find the area of a triangle using multiple formulas. It explains how to find the area of a right triangle using the formula A=1/2bh. All you need is the base and the height of the triangle. This video contains an example of using the pythagorean theorem to find the missing side of a right triangle. In addition, this tutorial provides the formula to find the area of an equilateral triangle given all 3 sides. This lesson also provides the formula to find the area of a scalene triangle given SAS - two sides and an angle using sines / trigonometry. Finally, this video explains how to find the area of a triangle with all 3 sides (SSS) using heron's formula. As you can see, this video contains plenty of examples and practice problems.

Solving Trig Equations - Finding All Solutions:

Solving Trig Equations With Multiple Angles:

Law of Sines:

More Examples - Law of Sines:

Area of an Oblique Triangle:

______________________________
The Height of a Triangle - Heron's Formula:

Law of Cosines:

Polar Coordinates:

Polar Equations to Rectangular Equations:

Rectangular Equations to Polar Equations:

How To Graph Polar Equations:

_________________________________
Complex Numbers - De Moivre's Theorem:

Dot Product of Two Vectors:

Trigonometry Final Exam Review:

Final Exams and Video Playlists:

Full-Length Videos and Worksheets:

[alexayers]

I'd never, ever heard of Heron's formula. Thank you.

[youngafrica]

This geometry video helped me a lot now I know geometry GOD BLESS YOU

[worldinsurance-talk]

Very helpful. Very focused. Less talk, to the point discussion. Thanks

[mikamakamoo]

You're a great teacher and all BUT I HATE MATHS WITH A BURNING PASSION!!!!

[patrickguillory-yygu]

I love this guy, he’s a great teacher ❤……… The federal government should be paying him❤

[Rainsong]

Thank you all the way from South Africa for your good quality teaching....

[dragonbattle]

Nice vid! Helpped me with my C++ programing exercise. I forgot how to calc this stuff.

[ravtwo]

Great explanation with examples, thank you

[symondrewcapulong]

wow thanks you teachway better than my teacher you know

[czymoondog]

I GOT MAJOR EXAMS, THIS WAS MY ONLY HOPE 😂
Thhhhx, ez 30 minute review, it helped a lot XD

[hmnasiruddin]

It’s very helpful for me.Thank you so much.

[nishantraj]

who is watching before 1 day of exams
like

[danmike]

It would be a smarter world if we tuned in daily to your videos opposed to games, movies, sports ect...

[sararamazani]

Great video! Thanks for sharing it 😊👍, But I have a question. When we have a traingle where two sides with different measurement and an included angle are given, we should use the formula (A=1/2×ab×sin C). Can we also use the pythagorean theorem to find the measure of the heigt, considering the the traingle has different side measurements? Or does the pythagorean theorem only apply to traingles with at lease two similar sides?

[dinoonfps]

I watch lots of your videos and they are very helpful I am hoping this one is to.

[BeauGeorge]

This is actually Mark Wahlberg teaching Math before he went into acting. 😊

[wimalthotagamuwa]

who els is waching this vedio with only a few ours left.

[alexanderraysierra]

These is easy math sub and a big thumbs up

[madisonfeehan]

What is this sorcery you have just used? I must master this! XD

[sagarmajumder]

If,
Area of a right angle triangle
= (1/2)•(height)•(base)
then,
how can you find the area
of second example using
the same formula?