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Maths > Shapes And Area > Flashcards

Shapes And Area Flashcards

1
Q

What is the perimeter?

A

The distance around its edge

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2
Q

What is the area?

A

The amount of space inside a shape

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3
Q

What is the area of a rectangle?

A

Base x height

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4
Q

What is the area of a triangle?

A

1/2 base x perpendicular height

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5
Q

What is the area of a parallelogram?

A

Base x perpendicular height

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6
Q

What is the area of a trapezium?

A

1/2 x (a + b) x h

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7
Q

How do you find the area of a compound shape?

A
  • Split the same into two sections (a+b)
  • Work out the area of each section
  • Add both sections together
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8
Q

What is the net of a 3D shape?

A
  • What a 3D shape looks like when unfolded
  • Add the sides together
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9
Q

What is the surface area?

A

The total area of the surface of a three - dimensional object

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10
Q

How do you find the surface area of a cuboid?

A

Find the area of the front, sides, top and bottom

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11
Q

How do you find the surface area of a triangle?

A
  • Find the area of the base, back and the sloped side
  • Add the areas together
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12
Q

How do you find the surface area of “L” shaped prisms?

A
  • work out the front, back, top, bottom, side and the ledges
  • add all the areas together
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13
Q

What is the volume?

A

The space an object takes up

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14
Q

What is volume measured in?

A

Mm³, cm³ etc

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15
Q

What is the volume of a cuboid?

A

Length x width x height

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16
Q

What is the volume of a triangular prism?

A

Areas of cross section x depth

Example:
½ x 4 x 3 x 6
= 6 x 6
= 36 cm³

17
Q

What is the volume of a prism?

A

Area of a cross section x length

18
Q

What is the Diameter of a circle?

A

A line that crosses a circle, passing through the centre

19
Q

What is the arc of a circle?

A

A part of the circumference of the circle

20
Q

What is the sector of a circle?

A

A part of a circle formed by 2 radii and an arc

21
Q

What is the segment of a circle?

A

A part of a circle formed by a chord and an arc

22
Q

What is the radius of a circle?

A

A line from the centre of the circle to a point on the circumference

23
Q

What is the circumference of a circle?

A

The distance around the outside of the circle

24
Q

What is the tangent of a circle?

A

a line that touches the circumference at one point only. It meets the radius at right angles

25
Q

What is the chord of a circle?

A

A line that joins 2 points on the circumference of a circle

26
Q

What is the circumference of a circle?

A

π x Diameter

27
Q

How do you find the circumference of a half circle?

A

π x diameter ÷ 2

28
Q

How do you find the area of a circle?

A

π x radius²

29
Q

How do you find the area of a sector?

A

Angle/360 x area of whole circle

30
Q

How do you find the volume of a cylinder?

A

πr² x length / depth / height

31
Q

How do you find the surface area of a cylinder?

A
  • Find the area of the top and the base (πr²)
  • Find the area of the side (π x diameter)
  • Total surface area = πd x h

Maths (8 decks)

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