Geometry

Question 1

congruent line segments

Answer 1

line segments that have equal lengths

Question 2

similar triangles

Answer 2

triangles that have the same shape but not necessarily the same size

Question 3

congruent angles

Answer 3

angles that have equal measures

Question 4

acute angle

Answer 4

angle with measure less than 90 degrees

Question 5

obtuse angle

Answer 5

angle with measure between 90 and 180 degrees

Question 6

polygon

Answer 6

a closed figure formed by 3 or more line segments (sides).

Question 7

vertices

Answer 7

endpoints of the sides of a polygon

Question 8

quadrilateral can be divided into how many triangles

Answer 8

Two

Question 9

pentagon can be divided into how many triangles

Answer 9

Three

Question 10

regular polygon, or regular octagon

Answer 10

a polygon in which all sides are congruent and all interior angles are congruent

Question 11

equilateral triangle

Answer 11

a triangle with three congruent sides. measures of 3 interior angles of an equilateral triangle are also equal, and are 60 degrees each.

Question 12

isoscoles triangle

Answer 12

triangle with AT LEAST TWO equal sides, with angles opposite the 2 sides being congruent.

Question 13

right triangle

Answer 13

a triangle with an interior right angle (90 degrees)

Question 14

hypotenuse

Answer 14

the side opposite the right angle in a right triangle

Question 15

pythagorean theorem

Answer 15

a squared plus b squared equals c squared

Question 16

congruent circles

Answer 16

circles with equal radii are congruent circles

Question 17

a chord

Answer 17

any line segment joining two points on the circle is called a chord

Question 18

an arc

Answer 18

given any two points on a circle, an ARC is the part of the circle containing the two points and all points in between them

Question 19

central angle of a circle

Answer 19

an angle with its vertex at the center of the circle

Question 20

measure of an arc

Answer 20

measure of its central angle, the angle formed by two radii that connect the center of the circle to two endpoints of the arc.

Question 21

sector of a circle

Answer 21

a region bounded by an arc of the circle and two radii.

Question 22

tangent to a circle

Answer 22

a line that intersects the circle at exactly one point, called the point of tangency

Question 23

point of tangency

Answer 23

the point at which a tangent intersects a circle

Question 24

what does it mean that a polygon in INSCRIBED in a circle?

Answer 24

all of the polygon’s vertices lie on the circle (or, the circle is CIRCUMSCRIBED about the polygon).

Question 25

what does it mean that a circle is CIRCUMSCRIBED about a polygon?

Answer 25

all of the polygon’s vertices lie on the circle (or, the polygon is INSCRIBED in the circle).

Question 26

concentric circles

Answer 26

two or more circles with the same center

Question 27

volume of a rectangular solid

Answer 27

the product of its three dimensions (volume equals length times width times height).

Question 28

circular cylinder

Answer 28

two bases that are congruent circles and a lateral surface made up of all line segments that join points on the two circles and are parallel to the line segment joining the centers of the two circles (think: a can of soda).

Question 29

volume of a right circular cylinder with a height of h and a base with radios r equals

Answer 29

the product of the height and the area of the base (or h times (pi)(r squared)(h)

Question 30

surface area of a right circular cylinder

Answer 30

the sum of the areas of the two bases and the lateral area, or two times (pi r squared) PLUS two pi r h.