Sewanhaka High School
Mrs. Lidowsky, Principal
Math 8
Mr. Long, Teacher
Class:______________
Date:________________________
Name:___________________________________
HW #69D: Triangle Inequality Theorem
Directions: Tell whether the given length can be the measures of the sides of a triangle. Prove why.
1) 5, 8, 13
2) 9, 12, 15
3) 3, 9, 15
4) 2, 3, 3
5) 1, 1, 2
6) 3, 4, 4
7) Which of the above “triangles” are isosceles? Explain.
8)
1 6
 
2 9
10) Find 25% of 160.
9)
1 15


2 16
11) ∆ABC  ∆DEF, AB = 5x, AC = 3x + 4, BC = 4x,
DF = 4x -2, find x and all sides of both triangles.
12) For the SHS newspaper, Joyce, the editor has a photo that has a height of 4" and a width of 6". She needs to
enlarge the picture proportionally to fit a space with a height of 7". What will the new width be?