Formulas
Nice calculations
Area
Simplifying rads
Circles
100

What is the formula for area of a triangle?

A = 1/2bh or A = bh/2

100

Find the area of the rectangle to the nearest 2 decimal places.


36.54 ft2

100

Find the area of the parallelogram with a base of 10m and a height of 12m. Round to the hundredths place if necessary.

120m2

100

Simplify:  sqrt(48) 

4sqrt(3)

100

What's the relationship between a radius, diameter, and circumference of a circle?

radius: center of circle to edge

diameter: twice the radius

circumference: pi * diameter

200

What is the Area formula for a rectangle?

A = L x W

200

Find the area of the triangle.

21 in2

200

What is the area of a triangle if the base is 3.5 cm and the height is 7 cm? round to the hundredths place.

A = 12.25 cm2

200

What's the length of the long leg of a 30-60-90 triangle with a hypotenuse of  18sqrt(3) ?

27

200

What's the difference between a sector and a segment?

Sector: "slice of pie" determined by a central angle

Segment: sector cut off by a chord connecting two points on the circumference

300

Area of a Parallelogram


A =  b x h

300

Find the area of the parallelogram with a base of 13.5m and a height of 12.5m

168.75m2

300

Find the area of the unshaded area, given that the quadrilateral is a square with side length 2 and the triangle's height is 1.6.


2.4un2

300

8/sqrt(3) * sqrt(5)/2

(4sqrt(15))/3

300

Find the area of the shaded sector. Leave your answer in terms of pi.


(5pi)/3

400

A rhombus shares the same area formula as a ________

Kite
400

What is the area of a triangle if the base is 5 cm and the height is 10 cm?

A = 25 cm2

400

What is the area of a 45-45-90 triangle with hypotenuse  44sqrt(2) ?

968

400

Simplify:  (7sqrt(22))/sqrt11 div sqrt 6 

(7sqrt3) / 3

400

Find the area of a quarter circle with radius 6 in. Keep your answer in terms of pi.

9pi

500

What is the formula for area of a circle?

a=3.14r2

500

ind the area of the trapezoid shown. 


1,560 ft2


500

What's the area of this triangle? Round to the nearest hundredth.


88.47un2

500

Simplify:  (-2sqrt7)/sqrt6 -1/sqrt6 

(-2sqrt42 - sqrt6)/6

500

Is this circle larger or smaller than a 10x11cm rectangle? What are their respective areas (round to hundredths)?

Larger;

113.04 cm

110cm2

1000

What's the area formula for a kite?

A = 1/2 * d1 * d2

1000

Area plz!


136 cm2

1000

What's the area of a regular decagon with side length 3? Round to the nearest hundredth.

69.3 un2

1000

 (-2sqrt2)^2 

8 :)

1000

What is the radius of a regular polygon? What relationship does it have to the radius of a circle?

A regular polygon's radius is the distance from the center of the polygon to a vertex. It is the same distance as the radius of the circle that circumscribes the polygon.

M
e
n
u