Line segment jl is an altitude in triangle jkm. which statement explains whether jkm is a right triangle? round measures to the nearest tenth. a) jkm is a right triangle because km = 15.3. b) jkm is a right triangle because km = 18.2. c) jkm is not a right triangle because km ≠ 15.3. d) jkm is not a right triangle because km ≠ 18.2.

C. JKM is not a right triangle because KM ≠ 15.3.

Step-by-step explanation:

We can see from our diagram that triangle JKM is divided into right triangles JLM and JLK.  

In order to triangle JKM be a right triangle .

We will find length of side KM using our right triangles JLM and JLK as .  

Using Pythagorean theorem in triangle JLM we will get,

Now let us find length of side KL.

Now let us find length of KM by adding lengths of KL and LM.

Now let us find whether JKM is right triangle or not using Pythagorean theorem.

Upon taking square root of both sides of equation we will get,

We have seen that KM equals 18.2 and in order to JKM be a right triangle KM must be equal to 15.3, therefore, JKM is not a right triangle and option C is the correct choice.    

or