Quadrilaterals
Interior and Exterior Angles
Area of
Regular Triangles
Area of Regular
Quadrilaterals and Hexagons
Vocab
100



Opposite sides are parallel.
What is a parallelogram?
100



Sum of the internal angles of a triangle.
What is 180°?
100



The area of a triangle with side length 10in.
What is 75/ √3  in2? [43.3]

A=1/2*a*P
a=5/ √3 
P=30
100



Area of a regular quadrilateral with apothem 5cm.
What is 100 cm2?
100



A figure with straight sides and a fully enclosed area.
What is a polygon?
200



Opposite sides are parallel and all angles are 90°.
What is a rectangle?
200



The sum of the external angles of any convex polygon.
What is 360°?
200



Area of a triangle with apothem 6cm.
What is 108 √3  cm2? [187.06]

A=1/2*a*P
a=6
P=36 √3 
200



Area of a regular quadrilateral with perimeter 20cm.
What is 25 cm2?
200



A polygon with at least one angle bent in toward its center.
What is concave?
300



Exactly one pair of parallel sides.
What is a trapezoid?
300



The measure of each internal angle of an octagon.
What is 135°?
300



Area of a triangle with radius 2m?
What is 3 √3  m2? [5.2]

A=1/2*a*P
a=1
P=6 √3 
300



Area of a regular quadrilateral with radius 3 √2  in.
What is 36 in2?
300



A polygon with nine sides?
What is a nonagon?
400



All sides are congruent.
What is a rhombus?
400



The measure of each external angle of a regular decagon.
What is 36°?
400



Area of a triangle with perimeter 18 √3  in.
What is 27 √3  in2? [46.77]

A=1/2*a*P
a=3
P=18 √3 
400



The area of a hexagon with apothem 5 √3  in.
What is 150 √3  in2? [259.81]

A=1/2*a*P
a=5 √3 
P=60
400



The segment from the center of a polygon to the midpoint of a side?
What is the apothem?
500



Exactly one pair of parallel sides; base angles are congruent.
What is an isosceles trapezoid?
500



The measure of each internal angle of a regular 60-gon?
What is 174°?
500



Area of a triangle with apothem 2 √3  cm.
What is 36 √3  cm2? [62.35]

A=1/2*a*P
a=2 √3 
P=36
500



The area of a hexagon with radius 4cm.
What is 24 √3  cm2? [41.57]

A=1/2*a*P
a=2 √3 
P=24
500



A polygon with n sides.
What is an n-gon?
M
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