Need help with my geometry

[tallyho8]

It's been so long since I got out of school, I can't remember how to solve this problem.
I can't even remember if its geometry, trigonometry or whatever. Maybe its early Alzheimer's?
Please help me find out how many square feet this is.

 

[prichard]

I usually Google it. There are lots of online calculators. I can't remember either.

 

[dieselcrawler]

436.35 square feet

 

[2LaneCruzer]

Yep; I got 436 approx.

 

[prichard]

Looked it up. It a side (30') plus b side (10') divided by 2 times the height. We don't know height and there's not enough info to determine.

 

[RalphVa]

It's 520 sq. ft. The distance between the 2 parallel pieces is the sq. rt of 24x24 + 10x10 = 26 (Pythagorean theory). Then 26x10 (2 triangles) + 26x10 (rectangle).

Two rt angle triangles plus a rectangle in between.

Ralph

 

[teejk]

I used to know all that stuff (always got A's) but got into a profession where it never got used (I still did a lot of algebra though). Decades later I now do a lot of woodworking and wished I could revive the geometry/trig.

 

[JPRambo]

Maybe my numbers are wrong but I get 480 sq ft. I do simple math. 30 x 24 =720. 24 x 10 (the two right triangle together) = 240. 720 - 240 =480 AM I wrong????

 

[prichard]

Ralph, you are correct if the sides are parallel and the right triangles are equal. Well now that I think about it not sure that have to be equal.

 

[Dapolksjj]

It's been so long since I got out of school, I can't remember how to solve this problem. I can't even remember if its geometry, trigonometry or whatever. Maybe its early Alzheimer's? Please help me find out how many square feet this is. <img src="http://www.tractorbynet.com/forums/attachment.php?attachmentid=465525"/>

your answer is 420square feet.

 

[ovrszd]

This is fun. I'm anxiously awaiting the debate toward the end result, which is of course, the correct answer.

So far we have 4 different answers.

 

[bcp]

About 1/100 acre, in round numbers.

Bruce

 

[tallyho8]

I thank everyone for their help. I was getting so many different answers I had to try to figure it out without using math. I drew it on a piece of paper, cut out the 2 sides, placed them together into a square and measured it.
My answer is 440 square feet.

I hope I am right because I am figuring out how much concrete I need to pour my driveway apron.

 

[ovrszd]

That sounds right to me.

And for some strange reason, when I saw this I had concrete in mind. Go figure.....

 

[prichard]

The distance between the two straight lines is 21.8 sqrt (24^2 - 10^2). So 21.8 x 20 = 438.

I'd go with 480 for concrete, I'd rather leave some on the truck than be short.

 

[Trails End]

I thank everyone for their help. I was getting so many different answers I had to try to figure it out without using math. I drew it on a piece of paper, cut out the 2 sides, placed them together into a square and measured it.
My answer is 440 square feet.

I hope I am right because I am figuring out how much concrete I need to pour my driveway apron.

View attachment 465543

View attachment 465544

You're close enough! Dieselcrawer is dead on - 436.35 sq. ft. Your 22' dimension is actual 21.8 feet.

 

[ovrszd]

So far I'm thinking Greg and Eric are the closest. Anxious to hear their mathematical method of getting that answer.

 

[JPRambo]

It not that complicated is it?

 

[SPYDERLK]

It's been so long since I got out of school, I can't remember how to solve this problem.
I can't even remember if its geometry, trigonometry or whatever. Maybe its early Alzheimer's?
Please help me find out how many square feet this is.

View attachment 465525

u got a rect 10x whatever. u got 2 rt triangles10x24 x whatever. solve triangle for whatever and u got it. 100 + whatever^2 = 24^2

 

[prichard]

It not that complicated is it?View attachment 465547

24 is the diagonal not the side. It is "c" in pathagrean theorem