Lines and Angles
Triangles
Quadrilaterals
General Geometry
100
An angle that is between 90 and 180 degrees
Obtuse angle
100
Point of intersection of three medians of a triangle
What is centroid?
100
Figure formed by two sets of parallel lines.
What is parallelogram?
100
½ * base * height
What is area of a triangle?
200
An angle that is greater than 180 degrees.
What is a reflex angle?
200
Value of x if the three angles of a triangle are 3x-10°, 4x+30°, and x°.
What is 20 degrees?
200
Quadrilateral in which there are four 90 degree angles.
What is a rectangle.
200
A triangle that is formed by cutting a square along a diagonal.
What is 45-45-90 triangle?
300
Angles whose measures add to 90.
What is complementary angles.
300
Intersection of the three altitudes of a triangle.
What is orthocenter?
300
This is the value of z if the four angles of a quadrilateral are 120°, 2z°-5°, 4z°+5°, and 2z°.
What is 30 degrees?
300
A figure formed by placing two equilateral triangles edge to edge
What is a parallelogram?
400
A straight line consisting of all points that are equidistant from sides of an angle
What is angle bisector?
400
The line containing the centroid, the orthocenter, and the circumcenter of a triangle
What is the Euler line?
400
A figure whose diagonals are perpendicular, equal segments that bisect each other
What is a square?
400
Segment from a vertex of a triangle that forms a 90 degree angle with the opposite side.
What is the altitude?
500
Sum of interior angles of a pentagon.
What is 540 degrees?
500
A line from a vertex of a triangle to a point on the line containing the opposite side of the triangle
What is a cevian?
500
A figure whose diagonals are perpendicular, unequal segments that do not bisect each other
What is a kite?
500
Number of diagonals in a hexagon.
What is 9?
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