Geometry - Plane Figures

Points, Lines, & Line Segments

1

What do you call lines that always stay the same distance apart and never cross?

Parallel

2

**** LUCKY SWITCH****

If you get this correct, your team may switch scores with any other team they choose.

What goes through two points and goes on forever in both directions?

Line

3

What do you call two lines that cross and form a right angle?

Perpendicular (I will also accept intersecting)

4

****POWER PLAY****

(choose another team to answer this question if you want.  If they get it correct, they get double the points)

What do you call a specific location in space?

Point

5

What do you call part of a line that has two endpoints?

Line segment

Angles

1

What do you call the common endpoint formed in the corner of an angle?

Vertex

2

What do you call a 90 degree angle that forms a square corner?

Right angle

3

What do you call part of a line that has one endpoint and goes on forever in the other direction?

Ray

4

****DAILY DOUBLE****

What do you call an angle that is bigger than a right angle?

Obtuse angle

5

What do you call an angle that is smaller than a right angle?

Acute angle

Polygons

1

***DAILY DOUBLE***

What do you call a polygon with six sides?

Hexagon

2

What do you call any closed, 2D plane figure made of line segments called sides?

Polygon

3

What do you call a polygon with 7 sides?

Heptagon

4

What do you call a polygon with 5 sides?

Pentagon

5

What do you call a polygon with 8 sides?

Octagon

Quadrilaterals

1

What do you call a quadrilateral that has four equal sides and two pairs of parallel sides, and does not need to have right angles but can?

Rhombus

2

**** LUCKY SWITCH****

If you get this correct, your team may switch scores with any other team they choose.

What do you call a quadrilateral with two pairs of parallel sides, four sides equal in length, that forms four right angles?

Square

3

What do you call a quadrilateral that has one pair of parallel sides and no sides that are equal in length?

Trapezoid

4

What do you call a quadrilateral with two pairs of parallel sides, that does not have to have right angles but can, and does not need to have sides that are equal in length but can?

Parallelogram

5

****POWER PLAY****

(choose another team to answer this question if you want.  If they get it correct, they get double the points)

What do you call a quadrilateral with two pairs of parallel sides that forms four right angles but does not need to have sides that are equal in length?

Rectangle

Triangles

1

What do you call a triangle with no sides that are equal in length?

Scalene triangle

2

****DAILY DOUBLE****

What do you call a triangle that has three angles that are less than 90 degrees?

Acute triangle

3

What do you call a triangle that has two sides that are equal in length?

Isosceles triangle

4

**** LUCKY SWITCH****

If you get this correct, your team may switch scores with any other team they choose.

What do you call a triangle that has three sides that are equal in length?

Equilateral triangle

5

What do you call a triangle that has one 90 degree angle?

Right triangle

Random

1

Formula for Area of Triangle

A= 1/2 (b)(h)

2

Formula for finding the hypotenuse of a triangle

a²+b²=c²

3

Formula for finding area of a trapezoid

A = 1/2 (h) (a+b)

4

**** LUCKY SWITCH****

If you get this correct, your team may switch scores with any other team they choose.

Find the area of a triangle whose legs are 6 inches and 9 inches in length

27 in²

5

****POWER PLAY****

(choose another team to answer this question if you want.  If they get it correct, they get double the points)

Find the 3rd side of a right triangle whose leg length is 9 cm and the hypotenuse is 16 cm. (Round answer to the nearest hundredth centimeter)

13.23 cm²