13-02-2015
Mathematics

Answered

What kind of equation could I use to solve this/how do I solve this:

If the same length is cut off three pieces of wood measuring 21cm, 42cm, and 45cm, the three pieces of wood can be assembled into a right triangle. What length needs to be cut off each piece?

Answer :

hikylewu hikylewu

15-02-2015

suppose the length needed to cut off as x
set quadratic equations and use the pythagorean identity (21-x)^2+(42-X) ^2=(45-x)^2
expand and distribute both sides to get quadratic equation x^2-36x+180=0, and find x to be 6cm

Answer Link

Other Questions

Identity true statements about quadratic function y ax2 bxc where a 0 1 It reaches either maximum or minimum at the vertex 2 Its domain consists of an increasin

compare and contrast contour feathers and down feathers

Supporters of the New Jersey Plan

Which barbarian tribe had a writing system called the runic alphabet that archaeologists have found carved in wood metal and stone in Europe

Could an organism survive without one of its organs

The dangling skin under a turkeys neck is called a Wattle b Weedle c Wuddle d Widdle

What is the answer 8d10 for d 4

Is 14 of 8 equal to 2

Select the definition of aristocracy A rule by a mob B rule by many C rule by a few individuals D rule by one person Help Please

what is the name of the large inland body of water bordered by Iran Azerbaijan Russia Kazakhstan and Turkmenistan