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Area formulas
Circle Circumference and Area
Circle sector
Ratio of areas
100
The area of this shape is half of a rectangle or square.
What is Triangle
100
the angle of a circle
What is 360
100
The region bounded by 2 radii and an arc
What is a sector
100
The ratio of the areas for two triangles with equal heights
What is the ratio of their bases
200
The formula for a trapezoid
What is A= 1/2h(b1+b2)
200
The area of a circle
What is pi r^2
200
The formula to find an arc length
What is 2piR * x/360
200
The ratio of the areas for two triangles with equal bases.
What is the ratio of their heights
300
4(1/8xy)
What is the equation for a Rhombus
300
the circumference of a circle
What is 2pi r
300
The formula to find the area of a sector
What is piR^2 * X/360
300
the ratio of the areas for two triangles that are similar.
What is the scale factor squared
400
The distance from the center of a polygon to the side, perpendicular.
What is apothem
400
the distance from the center of the circle to the edge
What is radius
400
The angle of a sector that fits into the circle 6 times
What is 60 degrees
400
The ratio of heights are 3 to 6. The ratio is
What is 1/2
500
A way to find the area of a regular polygon using the area of one of the triangles in it
What is number of sides times one triangle
500
A circle is inside of a circle with a radius twice as much as the inside circle's radius. How do the two circles' areas and circumferences compare?
What is the circumference and area of the bigger circle is 2 times as big and its area is 4 times as big.
500
The angle of a sector is 40 degrees. How many of these sectors fit into the circle?
What is 9
500
The scale factor of two triangles is 5. What is the ratio of the two triangles?
What is 25