1.
Which figure is an isosceles triangle?
A.
B.
C.
D.
Hint
2.
Triangle
KMS
is equilateral. Find
KM
if
KM
=
x
+ 6,
KS
= 2
x
– 3, and
MS
= 4
x
– 21.
A.
9
B.
15
C.
4
D.
21
Hint
3.
Which figure is an obtuse triangle?
A.
B.
C.
D.
Hint
4.
Which statement is not true?
A.
A triangle can be obtuse and isosceles.
B.
A triangle cannot be obtuse and contain a 90° angle.
C.
A triangle cannot be scalene and isosceles.
D.
In an isosceles triangle, the base is congruent to one of the legs.
Hint
5.
ABC is ______.
A.
equilateral
B.
scalene and acute
C.
scalene but not acute
D.
isosceles and scalene
Hint