1 
A parallelogram containing a right angle is called a: 
 A. quadrilateral
 B. square
 C. rectangle
 D. equilateral

2 
The point of intersection of the perpendicular bisector of the sides of a triangle meet is called. 
 A. Orthocenter of the triangle
 B. Incenter of the triangle
 C. Centroid of the triangle
 D. Circum center of the triangle

3 
If the points of contact of a common tangent to the two circles are on the same side of the line joining their centers, then this common tangent is called: 
 A. external tangent
 B. internal tangent
 C. concyclic tangent
 D. concentric tangent

4 
An equilateral rectangle is called a: 
 A. polygon
 B. quadrilateral
 C. parallelogram
 D. square

5 
The altitude of a triangle are: 
 A. concurrent
 B. collinear
 C. noncollinear
 D. nonconcurrent

6 
The point of intersection of the perpendicular bisectors of the sides of a triangle meet, is called: 
 A. circumcenter of the triangle
 B. incenter of the triangle
 C. centroid of the triangle
 D. orthocenter of the triangle

7 
A line segment joining a vertex to the midpoint of the side opposite to the vertex is called: 
 A. altitude of the triangle
 B. side bisector of the triangle
 C. angle bisector of the triangle
 D. median of the triangle

8 
All the altitudes are equal of an: 
 A. rectangle
 B. scalene triangle
 C. isosceles triangle
 D. equilateral triangle

9 
The midpoint of the diameter of a circle is called: 
 A. radius
 B. chord
 C. center
 D. tangent

10 
Medians to the equal sides of an isosceles triangle are: 
 A. congruent
 B. equal
 C. similar
 D. unequal
