MATH SOLVE

4 months ago

Q:
# A right triangle has a hypotenuse length of 13 units. One leg has a length of 12 units. Which equation can be used to determine the length of the other leg?LaTeX: a^2=12^2+13^2 a 2 = 12 2 + 13 2LaTeX: a=\sqrt{13^2-12^2} a = 13 2 β 12 2LaTeX: a^2=12^2-13^2 a 2 = 12 2 β 13 2LaTeX: a=\sqrt{12^2+13^2}

Accepted Solution

A:

a = β(13Β² - 12Β²) unitsFurther explanationGiven:A right triangle has a hypotenuse length of 13 units. One leg has a length of 12 unitsQuestion: Which equation can be used to determine the length of the other leg?The Process:We will solve a problem regarding right triangles. In the process, there is a relationship between the Pythagorean Theorem with Exponent and Square Root.Let us find out the equation to determine the length of the other leg. Let the length of the leg as "a".The Phytagorean Theorem: [tex]\boxed{ \ (leg)^2 + (leg)^2 = (hypotenuse)^2 \ }[/tex][tex]\boxed{ \ a^2 + 12^2 = 13^2 \ }[/tex]Subtract by 12Β² on both sides.[tex]\boxed{ \ a^2 = 13^2 - 12^2 \ }[/tex]To take the square root on both sides.So here's the equation that can be used to determine the length of the other leg: [tex]\boxed{\boxed{ \ a = \sqrt{13^2 - 12^2} \ }}[/tex]- - - - - - - - - -NotesIf we continue working on the above, the results will be as follows:[tex]\boxed{ \ a = \sqrt{13^2 - 12^2} \ }[/tex][tex]\boxed{ \ a = \sqrt{169 - 144} \ }[/tex][tex]\boxed{ \ a = \sqrt{25} \ }[/tex]Hence the length of the other leg equal to a = 5 cm.Of course, we agree with the use of the right intuition, which is to remember Pythagorean Triples, i.e., [tex]\boxed{ \ 5-12-13Β \ }.[/tex] This method is very convenient when working on multiple-choice tests in a limited amount of time.Learn moreWhat are the lengths of the legs of the triangle? Find out the measures of the two angles in a right triangle word problem of a quadratic equation