Areas of Shapes

Question 1

Area of a sector

Answer 1

degrees: (theta)/360 (pi)r^2

radians: 1/2 (theta)r^2

Question 2

Volume of a Sphere

Answer 2

4/3(pi)r^3

Question 3

Circumference of a Sector

Answer 3

degrees: (theta)/180 (pi)r

radians: (theta) r

Question 4

Volume of a cone

Answer 4

1/3h(pi)r^2

Question 5

Area of triangle

Answer 5

1/2 absinc

Question 6

Cosine rule

Answer 6

a^2 = b^2 + c^2 - 2bccos(A)