Math

Two sides of a triangle measure 7 cm and 15 cm . Which of the following could not be the length of the third side ?

A. 5 cm
B. 9 cm
C. 15 cm
D. 22 cm

I'm confused because at first I tried Pythagorean thereom and it didn't really work .

  1. 👍 0
  2. 👎 0
  3. 👁 296
asked by Valerie
  1. 7+15=22
    7-15=-8
    the line has to be between 8 and 22 to work, otherwise it would be a straight line so it cannot be a, 5cm

    1. 👍 0
    2. 👎 0
    posted by Al
  2. ...

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. math

    according to the triangle inequality, the length of the longest side of a triangle bust be less than the sum of the lengths of the other two sides. the two shortest sides of a triangle measure 3/10 and x + 1/5 and the longest

    asked by j on January 15, 2016
  2. Algebra 2

    Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar. Find the sum of a finite geometric series. The sides of an equilateral triangle measure 16 inches. The midpoints of the

    asked by Aby on January 6, 2016
  3. algebra 1 b

    The sides of a triangle have measures of x, x, and y, and the perimeter of the triangle is 46. The measure y is 4 centimeters longer than the measure x. Write the solution for this as an ordered pair.

    asked by Daniel on October 26, 2010
  4. algebra

    The sides of a triangle have measures of x, x, and y, and the perimeter of the triangle is 46. The measure y is 4 centimeters longer than the measure x. Write two equations which represent the two sentences. Solve the system you

    asked by brandon on September 1, 2010
  5. Algebra

    Need help with these-- 21. Find the possible values of a, of the distance between the points is 5, and the coordinates are (1, 1) and (4,a) 22. The Pythagorean Theorem works only for _______ triangles. Right? 25. Three sides of a

    asked by mysterychicken on June 21, 2010
  1. geometry (check answers)

    Determine whether you can construct many, one, or no triangle(s) with the given description. a) a triangle with angle measures of 50°, 70°, and 100° no b) a triangle with one angle measure of 60° and one 4-centimeter side no

    asked by cade on April 10, 2016
  2. PreCalc

    An isosceles triangle is a triangle with two sides that are the same length. Find the measure of the two equal angles to the nearest degree in a triangle that has sides of length 5ft., 5ft., and 6ft.

    asked by Lori on April 7, 2010
  3. Math(geometry)

    I need to know how to find the meausure of a triangle using vertical angles, and also how to measure a triangle using linear pairs... Oh, I hope I'm not too late with an answer for you... To measure a triangle using linear pairs,

    asked by Dani on October 2, 2006
  4. logic

    a student is using a geometry program to investigate the midsegments of a triangle. the student uses the program to draw triangle ABC, bisect the sides of the triangle, and draw segments connecting the midpoints to form triangle

    asked by luckybee on June 29, 2012
  5. math plz check ;-; sorry

    A triangle has sides of lengths 5 cm, 5 cm, and square root 47cm. Which of the following statements is true? A. The triangle is an obtuse triangle because (√47)^2>5^2+5^2 B. The triangle is an acute triangle because 5^2

    asked by leo on May 31, 2016
  6. math plz check ;-;

    A triangle has sides of lengths 5 cm, 5 cm, and square root 47cm. Which of the following statements is true? A. The triangle is an obtuse triangle because (√47)^2>5^2+5^2 B. The triangle is an acute triangle because 5^2

    asked by leo on May 31, 2016

More Similar Questions