Geometry
posted by JUn
A study draws triangle with a perimeter 36cm.the study says that the longest side measures 18cm. how do you know that the student is incorrect?

helper
Perimeter = 36
36  18 longest side = 18
This would mean that the remaining TWO sides total 18.
The length of any side of a triangle will always be less than the sum of the lengths of the other two sides and greater than the difference of the lengths of the other two sides.
18 is not less than sum of the other two
sides.
Respond to this Question
Similar Questions

geometry
The perimeter of a triangle is equal to 12 inches. The length of the longest side is equal to the sum of the other two sides minus 2. If you add 2 to the shortest side, it will equal the longest side. Find the side lengths. 
math; distributive property;perimeter of a triangl
How do I find the perimeter of a triangle if each side has an expression such as: 3x, and the second side let's say 4y, or the third side is 3x...something like that. Please help. I'm trying to study. 
Geometry
SORRY I FORGOT SOME QUESTI IN MY LAST POST!!! The lengths of two sides of a triangle are given. Describe the possible lenths for the third side. 19.) 5,11 20.) 12,12 21.) 25,10 22.) 6,8 25.) A student draws a triangle with a perimeter … 
geometry
in a triangle the middle length side is 3 more than the shortest side, and the longest side is double the middle lenght side the perimeter of the triangle is 45cm find the lenghts of the side 
Algebra
The backyard of a house is in the shape of a triangle. The longest side is 4 ft shorter than twice the shortest side. The third side is 4 ft less than the longest side. If the perimeter of the yard is 162 ft, what are the lengths of … 
Geometry
The sides of a triangle measure 9 , 15 , and 18 . If the shortest side of a similar triangle measures 6 , find the length of the longest side of this triangle . a . 5 b . 10 c. 12 d . 15 
Math
One side of a triangle is half the longest side. The third side is 7 less than the longest side. The perimeter is 53 feet. Find the three sides 
Geometry
The lengths of the sides of a triangle are 6 cm, 7 cm and 9 cm. In a similar triangle whose perimeter is 110 cm, what is the length of the longest side, in centimeters? 
Algebra
the perimeter of a triangle is 56 inches. the longest side measures 4 inches less than the sum of the other two sides. three times the shortest side is 4 inches more than the longest side. find the lengths of the three sides 
Maths
A triangle has side 9cm 12cm 18cm the longest side of a similar triangle measure 12cm what are the length of other side