Hi guys, I am going to be sharing with you,

showing you a new type of triangle that we are going to use a new rule and new tools

for solving this types of triangle. Now let us recap and revisit types of triangles we

have done before. Now you may remember this particular type of triangle and it was called

a right angle triangle and how do we know? Because we have the 90degrees right here and

we can solve this guys using sine, cos and tan and would find angles or length of height

of hypotenuse and we would be able solve things. So what happen if they are going to give us

a non-right angle triangle? Then what do we use? Because, if it is a non-right angle triangle

we cannot exactly use those trig rusher can we? So unknown right angle triangle would

be something like this. what happen if we got something like this? Unknown right angel

triangle and an angle opposite length an angle opposite the length? So another word we have

2 angle opposite 2 lengths and we solve them using the sine rule that is a great tool.

But what happen if you study this and you do not go to the test and you do not go in

this kind of triangle that is not very cozy is it? so what do you do? What is the plan?

What strategy? Well this is what you do there is a new rule then, you too I am going to

share with you. What happen when you go to a test and they give this triangle like this

and give you an angle, right there and right next to the angle surrounded by that angle

they give you – 2 lengths? In other words, the angle is snag right in the middle between

and surrounded between 2 length in the side. What did you do then? See this angle here

is cozy between 2 lengths, and if it is cozy there is a rule for it and it is called

cosine rule and it is a great tool for solving

right angle triangle for tackling when they give you an angle that is cozy between 2 length

this is also referred to and I referred to it as cozy rule. Stay tuned we are about to

use the new tool called cosine rule. Take a minute to check out in our website

at http://www.vividmaths.com. You will find additional resources, cheat sheets, transcripts

and other mass videos that are not available in Youtube. Lastly, don’t forget to subscribe

to get access to all ready answer for all your math questions plus other special offers.

Where are you guys from?

r u south african?

vivid maths is the best

This is why I am here…

In Class: John has 3 apples and he eats one. how many apples has he still got after?

In Exam: John has a glass. The diameter of the glass is 3cm, now calculate the angle of the sunlight on Guatemala

Vivid Maths is going to make me the beast!

Keep up with the Good Work! <3

Not that it matters, but what is his accent?

that's not very cozy is it

what a drongo

Very helpful

Dislike for the reason this guy doesn't know how to wear a polo shirt.

Ugh thank you so much! My math teacher is okay, he just forgets nice tricks like this. Thank you!

be my father plez sir

When Liam Gallagher teaches u maths

i am from Egypt and following yr vedios

This is so beautiful

#hypotnuse

Fuck you

Thank you sir

I fucking love this man

I remember it as the rude rule; because it has to points and something in the middle, like if your swearing on you fingers

looks a bit like a paedophile but good tutorial so 6/10