Question

help Please

Determine if 7, 8, and 13 can be the lengths of the sides of a triangle. If yes, classify the triangle.

A.
Yes, it is an acute triangle.
B.
Yes, it is an obtuse triangle.
C.
Yes, it is a right triangle.
D.
No, it cannot be a triangle.

Answer 1

@ganeshie8

Answer 2

for any 3 lengths to form a triangle :
the sum of any two lengths must always be GREATER than the third length

Answer 3

lets check, Are below inequalities true :

7 + 8 > 13 ?
8 + 13 > 7 ?
13 + 7 > 8 ?

Answer 4

no

Answer 5

they are true actually, check them again :/

Answer 6

7 + 8 > 13 ?

15 > 13

Isn't 15 greater than 13 ?

Answer 7

yes

Answer 8

similarly, if u check other inequalities, you will see that they are indeed true.

that means sum of any two given lengths is greater than the third length

Answer 9

sorry but i have to go

Answer 10

So, the given lengths do form a triangle

Answer 11

okay go :)

Answer 12

http://www.wolframalpha.com/input/?i=triangle+7%2C8%2C13