2 years ago

After you prove that two triangles are congruent, what would CPCTC be useful for?

Mathematics

1 answer:

Lapatulllka [165]2 years ago

6 0

Is useful in provingvarious theorems about triangles and other polygons.

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Two-thirds of a number is 22. what is the number?

Reika [66]

2x/3 = 22

2x = 66

x = 33

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2 years ago

Perform the indicated operation. 4/11 ÷ 4/9 9/11 16/99 1 2/9

Natalka [10]

Evaluate
Exact Form:
9/11

Decimal Form:
0.81∞

Answer: 9/11
Hope this helps! :)

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2 years ago

The chorus at an elementary school is made up on fifth and sixth graders. This year, the chorus had 12 fifth-grade girls, 9 fift

Sveta_85 [38]

Answer:

A. Ratio boys to girls ---> 19 : 26

B. Ratio of 5th grade to 6th grade ---> 21 : 24

C. Ratio of girls to total number of chorus students ---> 26 : 45

Step-by-step explanation:

A. the amount of boys is 9 + 10, the amount of girls is 12 + 26

B. the amount of 5th graders is 12 + 9, the amount of 6th graders is 14 + 10

C. the number of girls is 12 + 14, and the number of chorus students is 12+9+14+10

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2 years ago

I NEED HELP ASAP, will give brainliest

AleksAgata [21]

The answer is A I believe but I might be wrong.

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2 years ago

The length of a rectangle is 3cm greater than its width. the perimeter of the rectangle is 34cm. find its length.

mamaluj [8]

Answer:

10cm

Step-by-step explanation:

The formula for perimeter is:

$P=2(l+w)$

Let the width of the rectangle be x then the length would be...

3+x

Now, let's plug these values into the equation and solve. (Note we are also given perimeter is 34 cm):

$34=2(x+3+x)\\34=2(2x+3)\\Distribute\ the\ 2\ to\ each\ term\ in\ the\ parentheses\\34=2(2x)+2(3)\\34=4x+6\\Subtract\ 6\ from\ both\ sides\\4x=28\\Divide\ both\ sides\ by\ 4\\x=7$

And since the length is x+3 then it is...

x+3=7+3=10cm

4 0

1 year ago

Read 2 more answers