the lengths of the sides of a triangle are 11, 15, and 20 classify the triangle as acute, right, or obtuse.

The given triangle is NOT A RIGHT ANGLED triangle.

Step-by-step explanation:

Here, the given three sides of the triangle are: 11 , 15 and 20.

A. To check if the given triangle is RIGHT ANGLED or NOT

Here, the longest side  = 20

So, he hypotenuse  = 20

Now, if the given triangle a right angled then by PYTHAGORAS THEOREM

This is a CONTRADICTION   as, 400 ≠ 346

Hence the given triangle is NOT A RIGHT ANGLED triangle.

Now, we CAN NOT decide if the triangle is an Acute or Obtuse angled with the help of given sides.

For that classification, ANGLES SHOULD BE KNOWN.

6.5

step-by-step explanation:

you said it was in the question

~courtney

41*67/2=1373.5

step-by-step explanation:

i just used a calculator