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4 years ago

The sides of a triangle are in the ratio, 4:5:7 and its perimeter is 64cm. find its area , correct to 2 decimal places

Mathematics

2 answers:

marta [7]4 years ago

7 0

Answer:

since you have not specified the height, I will use any no.

= 0.16

Step-by-step explanation:

perimeter is the distance round

add the ratios; 4+7+5=16

Ratio 16= Perimeter 64cm

R.16=64cm, find all the ratios

start with ratio 4

R.16=64cm

R.4×64cm÷16=16 cm

R.5×64÷16= 20 cm

R.7×64÷16=28 cm

A=1/2× b×h

1/2×16×20= A= 160cm2

2 dp, divide

0.16

KATRIN_1 [288]4 years ago

5 0

Answer:

Step-by-step explanation:

First find all the sides of the triangle:

Total parts: 4+5+7 = 16

cm per part = 64/16 = 32/8 =4cm

therefore, all measures: 16cm, 20cm, 28cm.

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3 years ago

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GenaCL600 [577]

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Step-by-step explanation:

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4 years ago

as a contractor to make a hole 4 5/8 inches diameter. express the mixed number as an improper fraction.

san4es73 [151]

The mixed number as an improper fraction is 37/8

<h3>How to express the mixed number as an improper fraction?</h3>

The diameter is give as:

Diameter = 4 5/8

Next we convert the above number to an improper fraction

The numerator is calculated as

Numerator = 8 * 4 + 5

This gives

Numerator = 37

Hence, the mixed number as an improper fraction is 37/8