Formulas
Nice calculations
Area
Circles
1
What is the formula for area of a triangle?
A = 1/2bh or A = bh/2
1
Find the area of the rectangle to the nearest 2 decimal places.
36.54 ft2
1
Find the area of the parallelogram with a base of 10m and a height of 12m. Round to the hundredths place if necessary.
120m2
1
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
2
What is the Area formula for a rectangle?
A = L x W
2
Find the area of the triangle.
21 in2
2
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
2
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
3
Area of a Parallelogram
A = b x h
3
Find the area of the parallelogram with a base of 13.5m and a height of 12.5m
168.75m2
3
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
3
Find the area of the shaded sector. Leave your answer in terms of pi.
(5pi)/3
4
A rhombus shares the same area formula as a ________
Kite
4
What is the area of a triangle if the base is 5 cm and the height is 10 cm?
A = 25 cm2
4
What is the area of a 45-45-90 triangle with hypotenuse 44sqrt(2) ?
968
4
Find the area of a quarter circle with radius 6 in. Keep your answer in terms of pi.
9pi
5
What is the formula for area of a circle?
a=3.14r2
5
ind the area of the trapezoid shown.
1,560 ft2
5
What's the area of this triangle? Round to the nearest hundredth.
88.47un2
5
Is this circle larger or smaller than a 10x11cm rectangle? What are their respective areas (round to hundredths)?
Larger;
113.04 cm2
110cm2
6
What's the area formula for a kite?
A = 1/2 * d1 * d2
6
Area plz!
136 cm2
6
What's the area of a regular decagon with side length 3? Round to the nearest hundredth.
69.3 un2
6
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.