which statements about the diagram are true? select three
options.
de + ef > df
a def is an isosceles triangle.
15 de + de
def is a scalene triangle

Step-by-step explanation:

Notice that the given triangle has all three side different, that means it's an scalene triangle.

Additionally, the triangular inequality states that the sum of two sides of a triangle must be greater than the third side, that is

So, the first choice is also correct.

Then, we use thes triangular inequalities to find the third true statement.

We know that and

Also,

Therefore, , which means side DF must be between 5 and 13.

The third true statement is the third option.

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.

one set of data has more variation than the other. hope this !