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alisha [4.7K]
3 years ago
10

Decide if there is enough information to prove each of the following pairs of triangles are congruent.

Mathematics
1 answer:
kykrilka [37]3 years ago
8 0

Answer:

Step-by-step explanation:

1)Yes

In ΔABC and ΔDCE,

AC =CE  {GIVEN}

∠ACB = ∠ DCE     (Veritcally opposite angles)

BC =CD {GIVEN}

ΔABC ≅ ΔDCE       {Side Angle Side - SAS CONGRUENCE}      

3) Yes

In ΔRST and ΔVUT,

∠RST = ∠VUT = 90°{GIVEN}

ST =TU       {GIVEN}

∠RTS = ∠ VTU     (Veritcally opposite angles)

ΔRST ≅  ΔVUT     { Angle Side Angle - ASA CONGRUENCE}      

4)Yes

In ΔDEF and ΔDHG,

ED = DH  {GIVEN}

∠EDF = ∠ GDH     (Veritcally opposite angles)

FD = DG {GIVEN}

ΔDEF  ≅ ΔDHG       {Side Angle Side - SAS CONGRUENCE}  

2) NO  

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The difference in percentage of youngest and oldest age groups is 15.4%

<h3>The percentage from 11 to 20</h3>

Start by calculating the total number of people, as follows

People = 102 + 36 + 66 + 150 + 78 + 60 + 90 + 11 + 9

Evaluate

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The number of people in the age group 11 to 20 is:

Group = 36

So, the percentage is

Percentage = 36/602

Percentage = 6.0%

Hence, the percentage from 11 to 20 is 6.0%

<h3>The percentage from 31 to 40</h3>

The number of people in the age group 31 to 40 is:

Group = 150

So, the percentage is

Percentage = 150/602

Percentage = 24.9%

Hence, the percentage from 31 to 40 is 24.9%

<h3>The percentage from 71 to 80</h3>

The number of people in the age group 71 to 80 is:

Group = 11

So, the percentage is

Percentage = 11/602

Percentage = 1.8%

Hence, the percentage from 71 to 80 is 1.8%

<h3>The lowest percentage</h3>

This is the percentage of age group 81 to 90

And, the percentage is

Percentage = 9/602

Percentage = 1.5%

Hence, the lowest percentage on the chart is 5%

<h3>The percentage from 51 to 60 and 61 - 70 combined</h3>

The number of people in the age group 31 to 70 is:

Group = 60 + 90 = 15-

So, the percentage is

Percentage = 150/602

Percentage = 24.9%

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<h3>The difference in percentage of youngest and oldest</h3>

The youngest is 0 to 10 and the oldest is 81 to 90.

The number of people in these age groups are:

Youngest = 102

Oldest = 9

The difference is

Difference = 102 - 9

Difference = 93

So, the percentage is

Percentage = 93/602

Percentage = 15.4%

Hence, the difference in percentage of youngest and oldest is 15.4%

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