Question

Classify the triangle by its angles based on the side lengths 4.2, 6.4, and 7.6

Answer 1

Acute
Right
Scalene
Obtuse

Answer 2

scalen since the sides are not equal and we dont know the angles to determine if it were obtuse or acute

Answer 3

Let "c" be the longest side on each set of three numbers.
If c^2 = a^2+b^2, the triangle is right
If c^2 > a^2 + b^2, the triangle is obtuse
If c^2 < a^2 + b^2, the triangle is acute.

Answer 4

@nincompoop

Answer 5

So what is the longest side?

Answer 6

It's 7.6, right?

Answer 7

Yeah

Answer 8

What is 4.2^2?

Answer 9

What is 6.4^2?

Answer 10

What is 7.6^2?

Answer 11

my bad i read the question wrong lol

Answer 12

17.6, 40.9, and 57.7

Answer 13

It's good haha

Answer 14

a=4.2^2=17.64
b=6.4^2=40.96
c=7.6^2=57.76

Add A and B.

Answer 15

After you find the sum of A and B, compare it to C.

Answer 16

58.6

Answer 17

Is 58.6 equal to C, which is 57.76?

Answer 18

No

Answer 19

Then what is it? Is is more than C or less than C?

Answer 20

wouldnt u use sohcahtoa

Answer 21

to find the angles

Answer 22

Just what you said @joquez14 , you only use sohcahtoa to find the angles. Look up the question again. What is the given?

Answer 23

Side lengths, right? So you use the Pythagorean theorem. This is like the easiest lesson in Geometry.

Answer 24

this question has me totally confused im thinking u had to find the angles to classify it

Answer 25

another way would've been to use the law of sines to work out the angles.

Answer 26

@NICK702222 you still there?

Answer 27

Yeah

Answer 28

so @joquez14 if you want to evaluate the angles you can also do that.

Answer 29

I'm super confused

Answer 30

Just answer my question. :)

Answer 31

Is the sum of A and B greater than, less than, or equal to C?

Answer 32

is sine not apart of sohcahtoa

Answer 33

@Sepeario Just trying to help her find the easiest solution. :)

Answer 34

Sine, in fact, is part of the SohCahToa. S stands for Sine.

Answer 35

thats wat i thought so i wasnt completly wrong then

Answer 36

Is 58.6 equal to 57.7?
Is 58.6 more than 57.7?
Is 58.6 less than 57.7?

@NICK702222

Answer 37

Nope

Answer 38

Obtuse?

Answer 39

lol nope thts hilarious

Answer 40

No no wait

Answer 41

If c=sum, the triangle is right
If c>sum, the triangle is obtuse
If c<sum, the triangle is acute.

Answer 42

You're almost there. :)

Answer 43

First use the distance formula to find the sides. After using the distance formula, you can use Cosine Law to find the angles. But for this problem, one just needs to use the distance formula to find the sides and then graph it and they they tell what type of triangle and to check if it is a 90 or not they can use \( a^2+b^2=^c \) but one can also use this to tell for the other too, but you might be able just to eye it to tell.

Answer 44

If 57.7=58.6, the triangle is right
If 57.7>58.6, the triangle is obtuse
If 57.7<58.6, the triangle is acute.

Answer 45

Did you get it?

Answer 46

So it's acute

Answer 47

Got it right! I'd really appreciate it if you would give me a medal. :)

Answer 48

Thanks for the help

Answer 49

You're welcome!