CIRCLE FORMULAS
CIRCLES
POLYGONS
CIRCLES-2
POLYGONS-2
100
The ratio of the Circumference of a circle to its diameter [C/D] is equal to...
What is 3.14 or Pi.
100
The distance around a circle.
What is "circumference."
100
Who created the concept of the ratio of the circumference to the diameter of a circle is "Pi" or 3.14_ ?
Who were the Greeks, Pythagoras 2,200 years ago.
100
A line segment that goes from one side of a circle to the other side.
What is a "chord."
100
A parallelogram with four right angles and four congruent sides.
What is a square?
200
C = Pi * 2(R)
What is the Circumference [when radius is given, Pi * D when the diameter is given]
200
A special chord which passes from one side of a circle, through the center point, to the other side.
What is "diameter."
200
A stop sign is an example of this type of polygon.
What is an octagon? [eight sided polygon]
200
A circle is a polygon. True or False.
What is false?
200
A quadrilateral with exactly one pair of parallel lines.
What is a trapezoid?
300
A = Pi [R * R]
What is the AREA of a circle.
300
The distance from the center point of a circle to its edge.
What is a "radius."
300
The Department of Defense in Washington, DC, is housed in a building that has this shape.
What is a pentagon? [five sided regular polygon]
300
A tool used to measure the degree of an angle.
What is a protractor.
300
This type of quadrilateral has all the properties of parallelograms, rectangles, and rhombi.
What is a square?
400
With a radius of three centimeters [3cm], the circumference is? ...a) 6.14 ...b) 9.14 ...c) 18.84 ...d) 28.26
What is c) 18.84 ...or... C = 3.14 * 2 * 3
400
One-Half the length of the diameter of a circle.
What is a radius
400
A quadrilateral is described as a polygon having this many sides and verteces?
What is four sides and four verteces?
400
If a circle has an AREA of 28.26 cm^2, what is its radius?
What is... three centimeters [3cm] ...therfore... A = Pi [R * R] = 28.26 cm^2 / 3.14 = 9 = [R * R] ...therefore... R = 3cm
400
This triangle has a 90-degree angle.
What is an Right triangle?
500
With a diameter of six centimeters [6cm], what is the AREA of the circle? ...a) 6cm^2 ...b) 18.84 cm^2 ...c) 28.26cm^2 ...d) 37.68
What is... c) 28.26 cm^2 ...or... A = Pi [R * R] = 3.14 * 3 * 3 = 3.14 * 9 = 28.26 cm^2
500
The ratio between the distance around a circle and the diameter [C/D].
What is Pi [3.14].
500
A parallelogram with all sides congruent [equal]?
What is a rhombus?
500
If a circle has a circumference of 18.84cm, what is its diameter?
What is ... 6cm ...or... C = Pi * D = 3.14 * D ...therefore... 18.84cm = 3.14 * D ...therefore... 18.84cm / 3.14 = D = 6cm
500
Name the five [5] main shapes in the family of quadrilaterals.
What are... square, rectangle, rhombus, parallelogram, and trapezoid?
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