## 45-45-90 Special Right Triangles

How to find the missing side in a 45-45-90 Special Right Triangle.

0:09 What are the Ratios of the Sides in a 45 45 90 Triangle
1:03 Example 1 Solve for the Hypotenuse Given the Leg
1:31 Example 2 Solving for the Leg Given the Hypotenuse
1:54 Example 3 Solving for the Leg Given the Hypotenuse and Rationalizing

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### 44 Responses to “45-45-90 Special Right Triangles”

1. Christopher Anderson says:

Great video thanks sm

2. Kimberly Lynch says:

Just want to say thanks for helping me learn so much so quickly as I prep for the middle school math test for my license!

I feel so sad that I’m in calc 2 and needed to watch this for polar coordinate Cartesian equations 😂

4. Orb Spartan says:

Im a sophomore in high school and the teacher writes everything so sloppy and goes too fast. You explain it very carefully. Now i dont have to worry about failing my semester exam. Thanks man!

5. muna says:

thank you sooo much

6. Dark Griffin says:

What if y or x is just the square root of something

7. Historyiscool8899 says:

thankyou

8. Peanut Butta says:

Its amazing how you condensed a hour long class into two minutes while still managing to explain everything in a clear and concise manner. Great stuff man.

9. chris. says:

THANK YOU SO MUCH!

10. Zoyanne Baker says:

How do u find it if they didn't give the hypotenuse

11. Joshua Dottin says:

THANK YOU MR. MARIO

12. Jack Morrison says:

Let’s just say you sir just saved my math grade. Thank you so very much👍👍👍

13. Beanz z says:

thank u Mario

but your princess is in another castle.

I feel like we learn better when we watch videos then being taught because we are desperate and want to know how to solve said problem and so your brain (MAYBE IM NO SCIENTISTS)goes into ultra learn more and helps us understand better

15. Bob Dull says:

Thank you so much. I cant see the board even when siting in the front of the class, i had so much trouble and you made my life so much easier

16. Cameryn Helsdingen says:

I’m still confused

17. Emma Toney says:

Omg so i was stuck on my math for 30 straight minutes and I looked up a video about it…. just so happens to be this one and I GOT A 88!!!!!!!!! For me that is really good by i suck at math so thank you Mario….thank you

18. Emma Toney says:

Thank youuuuuu

19. Moonglow Melodies says:

I can’t see shit because of his body covering the white board

20. tj4y 4x says:

Thanks 🤝

21. Fayka Shizgar says:

Let me know how many indians are here👇👇

22. drdanglez says:

Thank you so much, you’re a lifesaver!

23. Ellie Guilford says:

my geometry teacher could never

24. Eljay Walter says:

That's so helpful on my module on how to do it…… great!I know it now thank u so much …keep it up sir

25. Hind Ajjouri says:

OMG LITERALLY THANK YOUUUU

i only have x and 45° but that’s it. idk what to do. there’s also a triangle on top of it that has a leg of 7 and 60°

27. Olivia Busiello says:

Wait is the 45-45-90 always gonna be an isosceles right triangle since the legs will be the same? I’m going into eighth and I haven’t learned this yet 😛

28. HoldenVlogs says:

Thank you so much! This makes so much more sense!

❤Thank youuuu!❤

30. Ciara Feliciano says:

What if the hypotenuse is radical 7 and I’d have to find the leg

31. abdiwali kuus says:

this is helping me so much in qurantine

32. Shaq LaVine says:

You’re an absolute legend Mario!

33. RorysonTV says:

omfg this is why i did so horrible at math, no real world use to put it in perspective. If i'm building a deck and the hypotenuse is 36" what are the lengths of X and Y?

34. Love Invalid says:

Thanks man

35. Fierrza says:

LITERALLY THE GOAT Kept switching from the 45 and 30 videos for my homework I was so clueless 4 hours ago thanks man

36. Chelzea Quiroz / chelzdancerr says:

What if the leg has a radical? (3 radical(2)) ? How do I find the hypotenuse?

37. Xternalz .-. Cam says:

I always forget little rules like this so I had to come back and relearn it because Geometry is amazing thanks dawg now I can do my homework 💀

38. mAsOn B says:

thanks bro

39. Connor Toriello says:

Mario, you just saved me

40. aman singh says:

Sir, thank you so much! I have a math test tommorow and I have learned more from your videos than in class. I am genuinely thanking you sir! You have always helped save my grades!!

41. UG_Calamityy says:

2 and a half minute video versus a one hour lesson was by far more effective. Thanks a lot!

42. Alexa Morin says:

Quiz tomorrow hope I pass, your videos help so much!!!

43. STEEZパライソ says:

Ay man I really appreciate what ur doing for us student✊🏾✊🏾💯💪🏾

44. Fatema Chehab says:

thank you!