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Phoenix [80]
3 years ago
14

What needs to happen before you can use the reason CPCTC?

Mathematics
1 answer:
zaharov [31]3 years ago
4 0
Answer: before you can use the reason CPCTC it must be stated that the triangles are congruente.

Explanation:

1) CPCTC stands for Corresponding Parts of Congruent Triangles are Congruent.

2) Therefore, to use that reason you first need to prove that the the triangles are congruent.

3) Once, it has been stated that the triangles are congruent, then you can use the reason to state the the corresponding segments are congruent which will let you to state the length of any side of one triangle known the corresponding side of the other triangle, because they are congruent (have the same length).
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(PLEASE HELP)
saveliy_v [14]

Given:

The two sides of a triangle are 2 and 6.

To find:

The side length that would NOT work to make a triangle with the two slide lengths of 2 and 6.

Solution:

For a triangle, the sum of two smaller sides must be greater than the largest side.

Let x be the third side.

Case 1: x is the largest side, then

2+6>x

8>x              ...(i)

Case 2: x is not the largest side, then

2+x>6

x>6-2

x>4              ...(ii)

From (i) and (ii), we get

4

Here, 4 and 8 are not included.

6, 5, 7 are included in the above interval, but 4 is not included in the above interval. It means 4 would NOT work to make a triangle with the two slide lengths of 2 and 6.

Therefore, the correct option is D.

6 0
3 years ago
A compound contains 40% calcium, 12% carbon, and 48% oxygen by mass. What is the empirical formula of this compound?
astraxan [27]

Answer:

3

Step-by-step explanation:

Explanation:

Although you have not been provided with direct masses, you can use the percentage composition values in place of masses.

First, calculate the number of moles of each element:

This is the formula for the ionic compound calcium carbonate, confirming that our result is indeed in the magnitude of a plausible answer. In fact, given the fact that calcium carbonate is ionic, it is also true that this empirical formula equates to the unit formula of the compound.

8 0
3 years ago
A set of n = 15 pairs of X and Y scores has SSX = ...A set of n = 15 pairs of X and Y scores has SSX = 10,SSY = 40, and SP = 30.
timama [110]
This question is asking only for the slope of the regression equation. This slope can be easily calculated using the following rule:
slope = SP / SSx

Examining the givens, we will find that both parameters are given where:
SP = 30 and SSx = 10

Substituting with the givens in the above mentioned equations, we can calculate the slope as follows:
slope = 30 / 10 = 3
3 0
4 years ago
There is a 40% markdown on a $45 pair of jeans. What is the price of the jeans after the markdown?
8_murik_8 [283]

Answer:

32.14

Step-by-step explanation:

your welcome :)

7 0
3 years ago
If it takes 5 hours for felicias phone to get on 1% how many hours will it take to get 100%
SVETLANKA909090 [29]
Depends on what phone you have.
3 0
3 years ago
Read 2 more answers
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