Given right triangle abc which of the following statements must be true? check all that apply.

Option A. <A and <B are complementary angles

Option D.

Step-by-step explanation:

we know that

If ABC is a right triangle

then

------> by complementary angles

and

Remember that

so

2nd one in the first row is correct

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.