Let
A
be the area of a triangle of side lengths
5
,
5
and
6
and let
B
be the area of a triangle of side lengths
5
,
5
and
8
. What is
A
/
B
?
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I applied Heron's Formula and then divided
great solution
Brilliant solution. I thought of Heron's Formula just like in instance after I finish read the problem. Don't even think about cutting them in half.
I also tried the Heron's formula but, everytime I divide it, the result is always 1.6
I applied the Heron's formula and got an answer 1.1!! It's correct if approximated,, right??
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You don't need to approximate or even use Heron's formula.
Cut each triangle along the lines of symmetry and for both you get two right angled triangles with sides 3,4,5 (by pythagoras).
This means that the areas are the same, which means that the areas of A/B=1 exactly.
i also used herons formula nd got ri8 answer
By Heron's formula, you will get exactly 1.
I did not understand the question
Height of 1st triangle(With area A)=Sqrt(5^2-3^2)=4
Height of 2nd triangle(With area B)=Sqrt(5^2-4^2)=3
Area A/ Area B = [(1/2)x6x4 ]/[(1/2)x8x3]= 1
in∆{5,5,6} call angle between side 5&6 : t so cos(t)=5^2+6^2-5^2(2×5×6)=.6 so sin(t)=.8 so area of ∆=1\2×5×6×.8=12, similarly in∆{5,5,8}. cos angle between 5&8=.8 so sin=.6 so area of∆=.5×5×8×.6=12. ratio =12\12=1####
Heros formula very easily...
S=a+b+c/2 s=8 s=9. put in it u ll get A=12 B=12
12/12=
1 Ans
1 its very simple................. AREA OF THE RED ONE(by Heron's Formula):- SIDES =5,5 and 6 and semi-perimeter=5+5+6/2=16/2=8 HERON'S FORMULA=√ s(s-a)(s-b)(s-c), where s=semi-perimeter, a,b,c are sides and so by substituting the values we get √8(8-5)(8-5)(8-6)=√8 3 3*2= √144=12(A)........ AND BY THE PROCESS WE CAN GET THE AREA OF THE BLUE TRIANGLE WHICH WILL BE ALSO = 12(B) SO A/B = 12/12=1 ANSWER....................
just go with phytagorean. The A got 4 wether the B got 3 in height. A= 0.5 x 6 x 4 = 12; B= 0.5 x 8 x 3 = 12; A/B=12/12=1.0
Herons formula is applicable in this question
for area A, find S= (a+b+c)/2= (5+5+6)/2=8 by using hero's formula AREA(A)=12 for area B, find S= (a+b+c)/2= (5+5+8)/2=9 AREA (B)= 12 => A//B= 1
4*6/2 = 12
3*8/2 = 12
12/12 = 1
heron's formula is also applicable directly
Here's another solution (without Heron's formula) Let A the base of the isoceles, and B be the another side. Cut each triangle into two. Then you can easily compute cos(t) for the oposite angle to the hypotenusa by cos ( t ) = A / 2 B
Using ( sin x ) 2 + ( cos x ) 2 = 1 you can write sin ( t ) = ( 1 − A / 2 B 2 ) 1 / 2
And the area of a triangle is B ∗ sin t ∗ A / 2
If you do this with each triangle you'll find that the ratio between the surfice of both triangles is actually 1
I though that the 5,8,8 triangle was bigger but maths never lie lol
I just felt both triangles have the same area so I answered 1 and got it right. :D This question feels like a typical optical illusion question where you are asked which is bigger. And the answer is always both objects are equal.
Using Herons Formula we see that both triangles have area 1 2 therefore the answer is 1 .
While this is correct, a more “Why is this true?" answer is that both are two 3-4-5 triangles put together
I was scared that I was doing something wrong because decimals were accepted..
S=(a+b+c)÷2 area=(s (s-a)(s-b)(s-c))^0.5
Very simple application of S.O.T
Kitbiuy formula is more useful than herons formula.
Warning: diagram not to scale ;D
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Cutting them in half, you get two 3,4,5 triangles (pythagorean triple).
No need for Heron's Formula.