Ask a question

One leg of a right triangle has a length of 7 centimeters. The other sides have lengths that are consecutive integers.find these lengths.

right triangles

2 Answers by Expert Tutors

Tutors, sign in to answer this question.
John Z. | Chemistry, Physics, SAT Math, and Calculus Tutor; CU Chemical EngineerChemistry, Physics, SAT Math, and Calcul...
5.0 5.0 (306 lesson ratings) (306)

You know by the Pythagorean theorem that a2 +b2 = c2 where a and b are the legs of the triangle and c is the hypotenuse or longest side. When they say the other two legs are consecutive integers, that means that x = x+1 or in this case c = b+1. By substituting c = b+1 and 7cm into the Pythagorean theorem, you will get:

72 + b2 = (b+1)2

FOIL the b+1 and get all the b's on one side (b2 will cancel since you have +1b2 on both sides). You should be able to solve for b. Then, use that value to get c since you know c = b+1. Check it by plugging your values back into the Pythagorean theorem.

Robert J. | Certified High School AP Calculus and Physics TeacherCertified High School AP Calculus and Ph...
4.6 4.6 (13 lesson ratings) (13)

Do you know the Pythagorean triple: 7-24-25?

Answer: The other two sides are 24 cm and 25 cm.