Angles
Circles
Triangles
Polygons
Definitions
100

An angle with a measure between 0° and 90° is what kind of angle?


acute

100

What do we call a line segment with endpoints on a circle?


chord

100

What do we call the side opposite the right angle in a right triangle?


hypotenuse

100

What do we call the endpoint of a side of a polygon?


vertex

100

What do we call the union of two non-coplanar half-planes and their common edge?


dihedral angle

200

An angle that measures 90° is what kind of angle?


right angle

200

What is defined as the ratio between the circumference and the diameter of a circle?


pi

200

What is the sum of the measures of the angles of a pentagon?


540°

200

What do we call a line segment that has vertices of a polygon for endpoints but that is not a side of the polygon?


diagonal

200

What do we call the intersection of two disjoint sets?


empty set



300

An angle measuring 180° is what kind of angle?


straight angle

300

In how many points does a secant line intersect a circle?



2



300

Define isosceles triangle.


A triangle with 2 congruent sides.

300

What do we call sum of the lengths of the sides of a polygon?



perimeter



300

Congruent polygons have the same _______ and ________.



size and shape



400

An angle measuring between 90° and 180° is what kind of angle?


obtuse

400

If a minor arc measures 70°, then what is the measure of the corresponding major arc?



290°



400

In ΔXYZ, if XY = 5, XZ = 8, and YZ = 4, then which is the largest angle.


Angle Y

400

What do we call the parallel sides of a trapezoid?


bases

400

In similar polygons the sides are _________.



proportional



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