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3 years ago

On a piece of paper, use a protractor to construct a triangle with angle measures of 20° and 30°.

Mathematics

2 answers:

Jobisdone [24]3 years ago

7 0

Answer:

Step-by-step explanation:

1. an acute angle triangle, wrong because , one of the angles has 130° and it is more than 90°

<h2><em>2. the third angle measures is 130°,. </em><em>correct because, 20°+30°+130°=180°</em></h2>

3.2 sides have the same length, wrong

<h2>4. it is an obtuse triangle, correct because,it has (greater than 90°) and two acute angles</h2><h2><em>5. all sides have different lengths,</em><em> correct</em></h2>

6. the third angle measures 50°, wrong because, 20+30+50=100 and 100 is not the sum of triangle angles.

Andrew [12]3 years ago

5 0

Answer:

option 2, 4, and 5 are correct.

Step-by-step explanation:

180 - (20+30) = 180 - 50 = 130

Obtuse triangle is a triangle that has one angle that is more than 90 degrees and all the sides have different lengths since all the angles are different.

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Answer:

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Step-by-step explanation:

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3 years ago

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Answer:

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Step-by-step explanation:

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4 years ago

Use the data set below to answer the following question.

RSB [31]

Answer:

2.4

Step-by-step explanation:

We have to find the mean first

$Mean = \frac{Sum}{No.\ of\ values}\\ = \frac{2+4+7+2+3+7+9+3+1+7}{10}\\ = \frac{45}{10}\\ = 4.5$

Now we have to find deviations.

Note that the deviations are calculated by subtracting the mean from the value. The distance is always positive so the deviations will be positive

Value Deviation

2 2-4.5 = |-2.5| = 2.5

4 4-4.5 = |-0.5| = 0.5

7 7-4.5 = 2.5

2 2-4.5 = |-2.5| = 2.5

3 3-4.5 = |-1.5| = 1.5

7 7-4.5 = 2.5

9 9-4.5 = 4.5

3 3-4.5 = |-1.5| = 1.5

1 1-4.5 = |-3.5| = 3.5

7 7-4.5 = 2.5

The last step is to find the mean of deviations.

$Mean\ of\ deviations = \frac{(2.5+0.5+2.5+2.5+1.5+2.5+4.5+1.5+3.5+2.5}{10}\\ = \frac{24}{10} \\=2.4$

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3 years ago

2(x+5 ) = 3x + 1 <br> i dont understand

Annette [7]

Answer:

x=9

Step-by-step explanation:

find x

2(x+5) = 3x+1

2x+10 = 3x+1

10-1 = 3x-2x

9 = x

x = 9

7 0

3 years ago

Read 2 more answers