Question

NEED HELP SOS
Find an integer, x, such that 5, 10, and x represent the lengths of the sides of an obtuse triangle.



A.
4
B.
5
C.
6
D.
11

Answer 1

In an obtuse triangle c^2 > a^2 + b^2

Answer 2

so if we take c = 10 what inequality can we write?

Answer 3

10^2 > 5^2 + b^2

can you solve this for b^2? then for b?

Answer 4

100 + 25

Answer 5

not +

Answer 6

100 > 25 + 36 for 6

Answer 7

i thought the asnwer would be 6

Answer 8

b^2 < 100 - 25
b^2 < 75

Answer 9

b < sqrt75
b < 8.66

Answer 10

im really confused

Answer 11

b cannot be 4 or 5 because that would not make a triangle and 11 > 8.66 therefore the answer is 6

Answer 12

8 isnt an option

Answer 13

oh i get it

Answer 14

i have one more question

Answer 15

ok

Answer 16

how do i find an acute triangle

Answer 17

Using Pythagorean inequalities, determine which set of the given three sides produces an acute triangle.

Answer 18

for an acute angle , if c is the longest side,
c^2 < a^2 + b^2

Answer 19

3, 4, 5
6,12,20
4,6,10,
5,12,18
ALL NUMBERS TO SQUARE ROOT

Answer 20

- and dont forget for all triangles the sum of any 2 sides must exceed the length of the other side

Answer 21

what

Answer 22

i dont know how to do it cause the numbers are squared

Answer 23

what exactly is the second question?

Answer 24

Using Pythagorean inequalities, determine which set of the given three sides produces an acute triangle.

Answer 25

6 minutes till time runs out on this question:/

Answer 26

well the first one is a right angled triangle because 5^2 = 3^2 + 4^2

Answer 27

what about C

Answer 28

rembember all the numbers are squared

Answer 29

the 2nd is not a triangle? can you see why?
neither is the third why?

Answer 30

4, 6,10
4x4 = 16
6x6=36

Answer 31

and 10^2 = 100

but 4+6 = 10 so its not a triangle..

Answer 32

oh

Answer 33

you cant draw a triangle with sides this length