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3 years ago

What does CPCTC mean in Geometry AND when it is used?

1 answer:

6 0

CPCTC?
Corresponding Parts of Congruent Triangles that are congruent

When?
Used when you are trying to prove that 2 triangles, sides, or angles are the same.

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4/5 n = 9/10 solve n

Alex787 [66]

N =9/8
n = 1 1/8

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3 years ago

What is the slope from the coordinate points (2,6) (1,9)

Hunter-Best [27]

Answer:

$m=-3$

General Formulas and Concepts:

Pre-Alg

Order of Operations: BPEMDAS

Alg I

Slope Formula: $m=\frac{y_2-y_1}{x_2-x_1}$

Step-by-step explanation:

Step 1: Define

Point (2, 6)

Point (1, 9)

Step 2: Find slope m

Substitute: $m=\frac{9-6}{1-2}$
Subtract: $m=\frac{3}{-1}$
Divide: $m=-3$

8 0

3 years ago

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On the coordinate plane below, quadrilaterals TRAP and HELP are similar to each other.

Elanso [62]

Answer:Quadrilateral TRAP has an area that is one-fourth the area of quadrilateral HELP.

Step-by-step explanation: Because you rearrange the squares and it is 1/4

6 0

3 years ago

What percent of the model is shaded green? (answer quick please)

MakcuM [25]

Answer:

30%

Step-by-step explanation:

3 rows out of 10 are shaded green. 3/10 is 30%

6 0

3 years ago

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In ΔCDE, the measure of ∠E=90°, the measure of ∠C=70°, and DE = 12 feet. Find the length of CD to the nearest tenth of a foot

Radda [10]

Answer:

$CD = 4.4ft$

Step-by-step explanation:

Given

$DE = 12$

$\angle C = 70^\circ$

Required

Find CD

This question is represented with the attached triangle

To solve CD, we make use of tan formula.

$tan(70) = \frac{DE}{CD}$

Substitute 12 for DE

$tan(70) = \frac{12}{CD}$

Make CD the subject

$CD = \frac{12}{tan(70)}$

$CD = \frac{12}{2.7475}$

$CD = 4.4ft$ --- approximated

6 0

3 years ago

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