Plane Geometry Flashcards

1
Q

Three undefined term in geometry

A

•point
•line
•plane

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2
Q

a flat surface without thickness

A

Plane

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3
Q

It’s a closed plane figure bounded by straight line segments as sides with 3 or more angles

A

Polygon

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4
Q

Types of polygons

A

Convex and concave

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5
Q

A polygon with all interior angles less than 180 degree

A

Convex

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6
Q

A polygon with all interior angles greater than 180 degree

A

Concave

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7
Q

is the line segment connecting two nonconsecutive vertices of a polygon

A

Diagonal

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8
Q

is the angle between two consecutive sides of a polygon

A

Interior angle

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9
Q

is the angle subtended by any side and the center of the polygon.

A

Central angle

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10
Q

is the angle formed by the extension of any side of a polygon and the next adjacent side.

A

Exterior angle

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11
Q

Defined as the distance from the center of a regular polygon to the midpoint of its sides

A

Apothem

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12
Q

A plane figure with four straight sided

A

Quadrilaterals

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13
Q

Is a quadrilateral in which opposite sides are parallel and equal

A

Parallelogram

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14
Q

Is a quadrilateral with only one pair of opposite sides parallel

A

Trapezoid

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15
Q

is a quadrilateral in which all sides are equal but none of the angles is 90°

A

Rhombus

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16
Q

is a quadrilateral in which pairs of opposite sides are parallel and equal and each angle is 90°.

A

Rectangle

17
Q

quadrilateral with four equal sides and four right angles.

A

Square

18
Q

Is the set of all points in a plane that are the same distance from a fixed point called the center.

A

Circle

19
Q

is a line segment joining the center to a point on a circle.

A

Radius

20
Q

is a chord through the center of the circle. twice the radius.

A

Diameter

21
Q

one of the two possible arcs determined by the endpoints of a diameter, taking its midpoint as centre.

A

Semicircle

22
Q

is any connected part of a circle.

A

Arc

23
Q

the distance around the circle

A

Circumference

24
Q

is an arc that is less than the semi circle

A

Minor arc

25
Q

is the arc that is greater than a semi-circle

A

Major arc

26
Q

is a segment joining two points of the circumference

A

Chord

27
Q

is a line that intersects the circle at two points

A

Secant

28
Q

is a line that touches the circle at one and only one point.

A

Tangent

29
Q

Is an angle formed by two radius

A

Central angle