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Annette [7]
2 years ago
10

1. A rectangle has a length of 5cm and a height of 4cm.

Mathematics
2 answers:
Gennadij [26K]2 years ago
5 0

Answer:

a

20cm squared

b

18cm

c

5cm

d

80cm

Step-by-step explanation:

a

Area is height multiplied by length in a regular quadrilateral

b

Perimeter is calculated by adding all the sides together

c

0.5 is effectively halving, so instead of 4 multiplied by 5 it is 2 multiplied by 2.5

d

2 is effectively doubling, so instead of 4 multiplied by 5 it is 8 multiplied by 10

dsp732 years ago
3 0

Answer:

  1. <u>20 cm²</u>
  2. <u>18 cm</u>
  3. <u>5 cm²</u>
  4. <u>80 cm²</u>

Step-by-step explanation:

<u>Q1(a)</u>

  • Area = length x height
  • Area = 5 x 4
  • Area = <u>20 cm²</u>

<u>Q1(b)</u>

  • Perimeter = 2(length + height)
  • Perimeter = 2(5 + 4) = 2(9)
  • Perimeter = <u>18 cm</u>

<u>Q1(c)</u>

  • New dimensions are : 5/2 = <u>2.5</u> and 4/2 = <u>2</u>
  • New Area = 2.5 x 2
  • New Area = <u>5 cm²</u>

<u>Q1(d)</u>

  • New dimensions are : 2 x 5 = <u>10</u> and 2 x 4 =  <u>8</u>
  • New Area = 10 x 8
  • New Area = <u>80 cm²</u>
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