Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**Carissa****Guest**

thanks daniel!

**Alexys****Guest**

careless25 wrote:

Post your question n i will see if i can help. ;)

i dont get any of this help

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 85,358

Hi Alexys;

Welcome to the forum.

Alexys wrote:

i dont get any of this help

How about mentioning where you are stuck. Then you can get help.

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

Offline

**ShivamS****Member**- Registered: 2011-02-07
- Posts: 3,523

@holly: Order doesn't matter because addition is commutative, but you cannot put opposite+adjacent=hypotenuse

You can switch opp and ad, but hyp you can not.

Offline

**ClareLM****Guest**

John E. Franklin wrote:

Here's another one to help you.

The big side is 5 long.

The short side is 3 long.

The medium side is 4 long.

The angle between the

two short sides must be

like a square corner to do

it this way.

l

l =

l =

l = 5×5=25

4 l =

×4 l =

___ l =

16 l_ = Here's the cool part!! 25 - 16 = 9

l_l___________= and 25 - 9 = 16

3×3=9 and 9 + 16 = 25

I LUV YOU!!!!!!!!!!!!!!! THANK YOU SOOOOOOOO MUCH!!!!!:lol::P:o:D:)

**kgk****Guest**

3daniel wrote:

use the pythagorean formula (a² = b² + c²)

a= hypotonuse

b= side

c= side

therefore

26² = 10² + x²

676 = 100 + x²

x² = 576

x = 24

ummm this person is wrong. the real equation you use is a²+b²=c²

so yeah all those people that you helped probably got the question wrong. Here is the right equation to try and help everybody!

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 85,358

Hi kgk;

Welcome to the forum.

3daniel is not incorrect. Just a little unorthodox in his use of letters.

a^2 = b^2 + c^2 is not incorrect as long as you put the 2 sides in b and c and solve for a.

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

Offline

**:-P****Guest**

my question says the area of a triangle is 32 sq. ft. if the base if 4 ft., what is the height?

HELLLLP!!!!!

Thanks!!!

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 85,358

Hi :-P;

Welcome to the forum!

The formula for the area of a triangle is:

Now just plug in for what you have:

Times both sides by 2.

So h or the height is 16 ft.

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

Offline

**jordan simonds****Guest**

bryan wrote:

i have a triangle it is a right triangle

the hypotonuse is 26

one leg is 10

the other leg is X

i do not know what to do to slove for xl

l =

l =

l = 26

10 l =

l =

l =

l_ =

l_l___________=

Xthat is the best way i could stech it on thereso do not hate

26 squared- 10 squared= 576. 576 square root= 24

**lucyann****Guest**

in triangle ABC the measure of angle A is 32, the measure of side a is 12 and the measure of side b is 10 Find the measure of the missing angles and side of triangle ABC. Round each measure to the nearest tenth.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 85,358

Hi lucyann;

Welcome to the forum! Do you know what the law of sines is?

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

Offline

**bieberfever****Guest**

i need help for something like this but im in 8th grade in integrated algebra and its a triangle on one side its 5 ft on the bottom line of the triangle its 8 ft. the last side is x. i need to find x how? plzzz tell me answer and how to do it i realy need help!!

3daniel wrote:

use the pythagorean formula (a² = b² + c²)

a= hypotonuse

b= side

c= side

therefore

26² = 10² + x²

676 = 100 + x²

x² = 576

x = 24

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 85,358

Hi bieberfever;

Is it a right triangle?

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

Offline

**jackie21137****Guest**

(

3daniel wrote:

use the pythagorean formula (a² = b² + c²)

a= hypotonuse

b= side

c= side

therefore

26² = 10² + x²

676 = 100 + x²

x² = 576

x = 24

[Incorrect, and rude, comment removed by moderator]

l a²+b²= c²

l =

l =

l = 26

10 l =

l =

l =

l_ =

l_l___________=

X=4:D

[24 is correct]

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 85,358

Hi jackie21137;

Welcome but I am sorry his answer is correct and yours is not. You are not using the pythagorean theorem correctly.

Please be more careful and tactful in correcting previous posts.

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

Offline

**Star1400000****Guest**

What is the missing side length if a= 10 b= 24 and c= x

a. 26

b. 36

c. 40

d. Square root of 124

Please help, not sure what to do

**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,507

Hi Star1400000

Welcome to the forum!

I suppose that the trianglw you are talking about is a right triangle.

Do you know the Pythagorean theorem?

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

Offline

**forgman****Guest**

help me to thanks

**shebly61#****Guest**

:(

LuisRodg wrote:

Sunnayyy wrote:i need help figuring out how to find the missing side of a right triangle with legs: a= 12, and b=9....?

So by following the formula given before:

Where:

a and b are the sides and c is the hypotenuse.

So you have sides a=12 and b=9.

im stupid

it took me forever to figure this out

**shebly****Guest**

hi shebly

I have edited the post you refer to as you are quite correct; it was wrong mathematically.

But I have also removed your remarks as they were also unnecessarily rude.

Why not join the forum and make a contribution.

But please read the rules first; here are two quotes from them:

This is not a place to be mean to others and these posts will not be tolerated. Light banter or constructive criticism can be allowed if it is polite and friendly. Remember, other people have feelings too. "Those who give respect shall receive it."

Make Yourself Understood. It is ok to sometimes use shortened words such as gr8, but too much of this will classify your post as spam.

Bob, moderator

**sarah123****Guest**

okay so i have a triangle with a side of 230m and 150m, what is the missing length?

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 85,358

Hi sarah123;

Is this a right triangle?

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

Offline

**Gillian__Smartiee****Member**- Registered: 2012-12-12
- Posts: 1

I don't know if I can explain my question properly but if someone understands please help!! Ok so the directions say Find the length of AB to the nearest hundredth centimeter. All measurements are in centimeters, but figures may be drawn to different scales. Explain your reasoning.

The first problem is a rectangle and it has a dotted line going from the bottom of the left corner (it has an A right next to it) to the top of the right corner ( it has a B right next to it). The bottom lenght of the rectangle measures 1.2 and the right side measures .8. The dotted line in the middle forms two triangle in the rectangle. Please someone help me!

Offline

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 85,358

Hi Gillian__Smartiee;

I have drawn your rectangle below, click on it to enlarge it. If my drawing is correct then to find AB you use the pythagorean theorem where c is AB.

Take the square root of both sides,

So AB = 1.4422205101 cm.

Do you know how to round that to the nearest hundredth?

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

Offline