#does anyone know what to do here ive been stuck
33 messages · Page 1 of 1 (latest)
i tried doing cosine rule to get the angle opposite to A and got the area with 1/2absin C
and im trying to substitute the area to 1/2 bh is that right
assuming A is 5 you could then just use sin=opposite/7
||By Heron's the triangle's area is 10√3. Then ½×8×h=10√3=>h=5√3/2.||
What is the area of that triangle?
This is the correct solution , and the answer in decimal form would be 4.33.
Listen…. You need to take the length x and 8 -x . Then do Pythagoras for both the triangles. For sure both the triangles have same height, hence find x. Then put the value of x and find height. Hope this helps you.
that is correct
here's the solution:
let's say the triangle is named ABC with the height as AD=h
BD is 'x'(let's say)
in Rt.∠ΔABD, using Pythagoras Theorem, we get
h² + x² = 25 ---(1)
using Pythagoras Theorem in Rt.∠ΔACD, we get,
x = 2.5 (upon simplifying and using (1))
now use the value of x (x=2.5) in (1) and you the answer
h² = 90/4
h = (5√10) / 2
h ≈ 4.33
that's the answer
I think you made a mistake in the substitution. The answer is ℎ ≈ 4.33
yep, my bad
Solution
Let’s solve for the height of the triangle step-by-step:
The image shows a triangle with side lengths a=5 cm, b=7 cm, and base c=8 cm.
The height h is dropped perpendicularly to the base c, dividing the base into two segments, let's call them x and 8−x.
This creates two right-angled triangles.
We can use the Pythagorean theorem on both right-angled triangles:
Triangle 1 (left side):
x2+h2=52
x2+h2=25
Triangle 2 (right side):
(8−x)2+h2=72
(8−x)2+h2=49
Step 1:
Express h2 from the first equation:
h2=25−x2
Step 2:
Substitute this expression for h2 into the second equation:
(8−x)2+(25−x2)=49
Step 3:
Expand and solve for x.
First, expand (8−x)2=64−16 x+x2:
(64−16 x+x2)+25−x2=49
Step 4:
Simplify the equation by combining like terms.
Notice that x2 and −x2 cancel out:
64−16 x+25=49
89−16 x=49
Step 5:
Isolate the term with x:
89−49=16 x
40=16 x
Step 6:
Solve for x:
x=1640
x=25=2.5 cm
Step 7:
Substitute the value of x back into the equation for h2 from Step 1:
h2=25−x2
h2=25−(2.5)2
h2=25−6.25
h2=18.75
Step 8:
Calculate h by taking the square root:
h=18.75
Step 9:
Calculate the numerical value and round to two decimal places as requested:
h≈4.330127...
h≈4.33 cm
Final Answer:
h≈4.33 cm
cassie hope it help you, i just copied from AI math solver xD
That's what I did
Multiple people have given this exact solution a while ago, and also pls don't post ai solutions if you're not sure of their validity, since the point of this forum is to get human help
Where
Here
I thought it's just a black line