### A right triangle is isosceles.

```HOT
SEAT
CHALLENGE
SCORING
• First team finished with
• 3 Points
• Second team finished
• 2 Points
• 1 Point
• -2 Points
• Talking
• -3 Points
DETERMINE IF
THE FOLLOWING
STATEMENTS
ARE
ALWAYS/SOMETIMES/NEVER
S
1
A right triangle
is isosceles.
S
2
If AB is the
perpendicular bisector
of CD, then CD is the
perpendicular bisector
of AB.
N
3
The base angles of
an isosceles
triangle are
obtuse.
N
4
A right triangle
can be
equilateral.
N
5
An obtuse scalene
triangle is congruent
to an acute scalene
triangle.
S
6
The base of an
isosceles triangle
is shorter than
either leg.
A
7
If three sides of one
triangle are congruent to
three sides of another
triangle, the triangles
are congruent.
S
8
The perpendicular
bisector of a triangle
passes through the
opposite vertex.
A
9
If a median of a
triangle is also an
altitude, then it is
also an angle
bisector.
10
N
An obtuse
triangle has three
obtuse angles.
11
S
Two equiangular
triangles are
congruent.
12
S
The diagonals of a
parallelogram are
perpendicular.
13
A
A square is a
rectangle.
14
N
A parallelogram is
a trapezoid.
15
A
Opposite angles
of a parallelogram
are congruent.
16
A
The diagonals of a
rhombus are
perpendicular bisectors of
each other.
17
N
The diagonals of a
trapezoid bisect each
other.
18
A
The diagonals of a
square are congruent.
19
A
Consecutive angles in a
parallelogram are
supplementary.
20
S
A rectangle is a kite.
21
A
A quadrilateral with two
disjoint pairs of
consecutive sides
congruent is a kite.
22
S
congruent diagonals is a
rectangle.
23
A
A parallelogram with
is a rhombus.
24
S
m || n
One plane contains m
while another plane
contains n.
The two planes are ||.
25
S
There are three lines:
l, m, and n.
l || m, m || n, and l || n
l, m, and n are coplanar.
26
S
If a line is perpendicular to
one of two skew lines then
it is perpendicular to the
other.
27
S
AX  BX
BX is in plane m
AB  plane m
28
S
Lines parallel to the same
plane are parallel.
```