Suppose a triangle has sides a, b, and c with side c the longest side, and that a2 + b2 c2. Let θ be the measure of the angle opposite the side of length c. Which of the following must be true? Check all that apply.

Question

Suppose a triangle has sides a, b, and c with side c the longest side, and that a2 + b2 > c2. Let θ be the measure of the angle opposite the side of length c. Which of the following must be true? Check all that apply.

anonymous · Answer

A.	The triangle is not a right triangle.
 		B.	 is an acute angle.
 		C.	cos < 0
 		D.	The triangle in question is a right triangle.

anonymous · Answer

ANSWER is A & B

anonymous · Answer

In order to apply the law of cosines to find the length of the side of a triangle, it is enough to know which of the following?
	A.	The lengths of two of the triangle's sides and the measure of the angle between them
	B.	The measure of an angle and the length of the side opposite that angle
	C.	The area of the triangle

anonymous · Answer

answer is A

anonymous · Answer

Answer:
A. is an acute angle
B. the triangle is not a right triangle
C. cos   >0