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4 years ago

Is triangle ABC similar to triangle DEF? why or why not.

Mathematics

1 answer:

Lana71 [14]4 years ago

3 0

Answer:

Step-by-step explanation:

Two triangles are congruent if they have the same three sides in proportion and they have exactly the same angles.

If the angles are different, the triangles are not similar.

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2350 in standard form

pogonyaev

2×1000+3×100+5×10+0×1

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3 years ago

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Find the sum of the first 8 terms of the sequence: -5. 15, -45, 135, .......

MakcuM [25]

Sum of geometric sequence

for the sum where the initial value is a₁ and the common ratio is r and the term is n

$S_n= \frac{a_1(1-r^n)}{1-r}$

common ratio is -3
-5 times -3 is 15, -15 times -3=-45 etc
first term is -5
and we want the 8th term

$S_8= \frac{-5(1-(-3)^8)}{1-(-3)}$
$S_8= \frac{-5(1-6561)}{1+3}$
$S_8= \frac{-5(-6560)}{4}$
$S_8= \frac{32800}{4}$
$S_8= 8200$

the sum is 8200

7 0

3 years ago

Each vertical cross-section of the triangular prism shown below is an isosceles triangle.

Fantom [35]

Answer:

<h3>x = 3 units</h3><h3></h3>

Step-by-step explanation:

use Pythagorean theorem:

a² + b² = c²

where a = h

b = 8/2 = 4

c = 5

<u>plugin values into the formula:</u>

h² + 4² = 5²

h² = 5² - 4²

x = √9

x = 3

7 0

3 years ago

The probability that the parking lot of a mall is full on a holiday is 0.19. The probability that it is a holiday is 0.29. What

dybincka [34]

Answer:

66%

Step-by-step explanation:

Use conditional probability.

P(full | holiday) = P(full AND holiday) / P(holiday)

P(full | holiday) = 0.19 / 0.29

P(full | holiday) ≈ 0.66

8 0

3 years ago

Help help help help help help

kati45 [8]

Answer:

$6^{5}$

Step-by-step explanation:

I hope this helps

4 0

2 years ago

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