Can you find the angle? This Math Problem is Designed to TRICK YOU!

Рет қаралды 12,413

Күн бұрын

Пікірлер: 29

@Kleermaker1000 2 ай бұрын

The cosine of the other angle with which the angle to be found has 180 degrees is 4/8 or 1/2 and that means: 60 degrees (I didn't recognize the triangle as a 30-60-90 special right triangle, I blindly began to use the rule of cosine ( CAH :) ). Anyway, the angle to be found is 180 degrees minus 60 degrees = 120 degrees. Now I have to find out what the trick was. :)

@saltydog584 7 ай бұрын

The rule of cosines will do it even if you didn't recognise it as a 30-60-90 triangle (as I didn't!)

@stevegreen2432 7 ай бұрын

To do this in my head---divide all sides by 4 . Sides are now 12 and sqrt 3. square each gives 1 4and 3. 1+3=4 so its a right angle triangle. Thus 90/30/60. Thus 180 -60+120

@DildoraAchilova-i2b 3 ай бұрын

Интересный метод! Спасибо что перевели)

@user-wv9bo6nm8k 11 ай бұрын

No wonder people end up hating Math, this video is a good example of how Math shouldn't be taught.

@devonwilson5776 11 ай бұрын

Greetings. Certainly we can find the value of the external angle. Based on the details given, we shall use the laws of cosine to determine the required angle. First, we shall assume that we have a ABC triangle with line AB extended to D to get rather to form the external angle CBD. Now, we shall use the formula B^2=A^2+C^2-2ACCOSB to determine the value for angle ABC. Thereafter, we shall deduct the value of angle ABC from 180 degrees to determine the value of external angle CBD. Plugging in the figures gives (4×3^1/2)^2=4^2+8^2-2(4)(8)CosB 48=80-64CosB, -32=-64CosB, CosB=32/64=.5. That is angle B, ABC, equals 60 degrees. Consequently, our required external angle, CBD, is 180 degrees minus 60, angles on a straight line, 120 degrees. Lovely.

@malectric 11 ай бұрын

I recognized that it was a right-angled triangle using Pythagoras. Inverse cosine gave the inner acute angle of 60 deg. which meant the obtuse angle had to be 120 deg.

@russelllomando8460 11 ай бұрын

got it. 30-60-90 RT and either Exterior or Supplemental angels. Thanks for the fun.

@rodfulford4306 11 ай бұрын

Always known those triangles as 1,2, root3 as the basic ratio

@mvendi86 3 ай бұрын

This stuff just doesn't make any sense, how the heck does anyone get through college math

@educacionenfinanzas9545 11 ай бұрын

Great video!😊

@nmklpkjlftmch 11 ай бұрын

I get the trick. The arrow doesn't point directly at the angle but slightly towards the inside of the triangle to fool you into thinking that you meant the 60° angle on the inside of the triangle.

@roysmallian2889 11 ай бұрын

You did not tell how yon got 30 and 60 for the other two angles rather than say 40 an d 50 or 20 and 70. Is the key that the hypotenuse is double the length of the one side? That would hold no matter what the size of the triangle is. ------that is, the proportion of the sides would have to be maintained. in all such cases to derive 30 and 60 degrees.

@Pegasus19398 11 ай бұрын

135

@topkatz58 11 ай бұрын

120°

@themanwithnoname8241 11 ай бұрын

120 degrees in 5 seconds

@CawasKapadia 11 ай бұрын

Dr. Kapadia- angle 120 degrees

@CawasKapadia 11 ай бұрын

30-60-90 triangles

@johnplong3644 11 ай бұрын

Well this is. basic trigonometry 120

@CawasKapadia 11 ай бұрын

120 degrees

@johnnyllooddte3415 11 ай бұрын

16 + 48 = 64 right angle

@CawasKapadia 11 ай бұрын

Please go back to school and pay attention. Dr. K.

@dianahill5116 11 ай бұрын

(Joke) What happens, when you remove a little bit of sand from an hourglass? **You end-up short on time.

@thenetsurferboy 11 ай бұрын

Did you know you will live longer at the base of a tall building? Time travels slower there But only by a minute amount Time is BENT Amazing. [Einstein]