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Right Triangle Area Formula

A= (1/2)hb= hb/2

altitude

the perpendicular segment from a vertex to the line containing the opposite side

Triangle Area Formula

A= (1/2)hb

Trapezoid Area Formula

A= (1/2)h(b1+b2)

Parralellagram Area Formula

A= bh

Pythagrean Theorem

a^2+b^2=c^2

Circle Circumference Formula

C= πd

C= 2πr

C= 2πr

Computing Arc Length

2πr * (x/360)

Circle Area Formula

A= πr^2

Areas of Sectors

πr^2 * (x/360)