Circles, Pie, Pythagoras Theoreum, surface area

Question 1

What is a radius on a circle?

Answer 1

Half of the diameter

Question 2

What is the diameter?

Answer 2

One side to another side of a circle

Question 3

How do you find the circumference of a circle?

Answer 3

Pie X diameter

Question 4

How do you find the area of a circle?

Answer 4

Pie X radius squared

Question 5

How do you find the diameter of a circle?

Answer 5

Radius x2

Question 6

How do you find the length of an arc?

Answer 6

Find circumference (pie X d) then divide by 360 and multiply by the angle

Question 7

What is a sector?

Answer 7

A piece of a circle

Question 8

How do you find an area of a sector?

Answer 8

Pie X radius X angle ➗180

Question 9

How do you find the volume of a prism?

Answer 9

Area of cross section X length

Question 10

How do u find the volume of cylinder?

Answer 10

Pie X radius squared X height

Question 11

How do u find the surface area of a cylinder?

Answer 11

Pie X radius squared (top circle)
 add
Pie X radius squared (bottom circle) 
Add
Pie X diameter X height
Basically 
Pie X diameter X height + 2 X pie X radius squared

Question 12

Pythagoras theorem

Answer 12

A squared + b squared = c squared

The area of the smaller side ( eg the side is 5 cm it will now be 25 cm)
Added to the area of the other smaller side then square root it, the answer will be the same as the longer side ( hypotenuse). If it works the triangle is definitely a right angled triangle.

Question 13

Pythagoras theorem: short sides

Answer 13

Hypotenuse squared - short side squared = other short side ( don’t forget to square root the answer)

C squared - b squared = a squared