Chapter 9 Flashcards by Leia Johansson

Q

What is the area of a right-angled triangle?

A

base x height / 2

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Q

What is the area of a non-right angled triangle?

A

ab x sinC / 2

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Q

What is the area of a parallelogram when the ph is given?

A

b x ph

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Q

What is the area of a parallelogram when the ph is not given?

A

ab sinC

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Q

What is the area of a rhombus?

A

diagonal x diagonal / 2

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Q

What is the area of a trapezium?

A

(a + b) x ph / 2

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Q

How do you find the circumference of a circle?

A

2πr

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Q

What is the area of a circle?

A

πr2

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Q

What is the arc length of a circle?

A

x/360 x circumference

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Q

What is the sector area of a circle?

A

x/360 x area

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Q

What is the area of segment of a circle?

A

Area of sector - area of triangle

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Q

What is the value of pie?

A

3.142 or 22/7

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Q

What is the CSA of a cylinder?

A

2πrh

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Q

What is the TSA of a cylinder?

A

2πrh + 2πr2

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Q

What is the volume of a cylinder?

A

πr2h

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Q

What is the CSA of a cone?

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A

πrl

Q

What is the volume of a cone?

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A

πr2h/3

Q

What is the TSA of a cone?

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A

πrl + πr2

Q

What is the surface area of a sphere?

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A

4πr2

Q

What is volume of a sphere?

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A

4πr3/3

Q

What is the CSA of a hemisphere?

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A

2πr2

Q

What is the TSA of a hemisphere?

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A

3πr2

Q

What is the volume of a hemisphere?

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A

V= 4πr3/3

Q

What is the volume of a pyramid?

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A

1/3 x area of base x ph

What is the area of base of a square pyramid?

L2

What is the area of base of a rectangular pyramid?

L x B

What is the area of base of a circular pyramid?

πr2

What is the area of base of a triangular pyramid?

b x ph/2 OR ab sin C/2

What is the volume of a prism?

Area of cross section x length