1.	Triangle RST is isosceles with as the vertex angle. If ST = 3x - 11, SR = x + 3, and RT = x - 2, find RT.
		A.	5	B.	14
		C.	9	D.	7
		Hint
	2.	Triangle KMS is equilateral. Find KM if KM = x + 6, KS = 2x – 3, and MS = 4x – 21.
		A.	9	B.	21
		C.	15	D.	4
		Hint
	3.	Which triangle is isosceles?
		A.	with vertices M(4,5), N(4,2), and P(-5,2)
		B.	with vertices R(3,5), S(1,-8),and T(-1,7)
		C.	with vertices F(-1,-5), G(-3,4), and H(5,2)
		D.	with vertices A(3,0), B(0,6), and C(3,6)
		Hint
	4.	Which statement is not true?
		A.	A triangle can be obtuse and isosceles.	B.	A triangle cannot be scalene and isosceles.
		C.	A triangle cannot be obtuse and contain a 90° angle.	D.	In an isosceles triangle, the base is congruent to one of the legs.
		Hint
	5.	ABC is ______.
		A.	isosceles and scalene	B.	equilateral
		C.	scalene but not acute	D.	scalene and acute
		Hint