Unit 7 - Area and Surface Area

Area of a rectangle

A=bh

Area of a parallelogram

A=bh

Area of a triangle

A=1/2bh

Area of a trapezoid

A=1/2(b1+b2)h

Area of a kite

A=½d₁d₂

Apothem

A perpendicular segment from the center of a regular polygon to a side.

Area of a regular polygon

A=1/2ap or A=1/2asn

Area of a circle

A=πr²

Area of a sector

(arc measure/360)pir^2

Area of a Segment of a Circle

(arc measure/360)pir^2

annulus

the region between two concentric circles

Area of Annulus

πR^2

Surface area of prism

2B+Ph

Surface Area of a Cylinder

2πr² + 2πrh

Surface Area of a Pyramid

B+1/2Ps

Surface Area of a Cone

πrl+πr²

Surface area of a sphere

4πr²