In 1912 Alfred Wegener (1880-1930) noticed the same thing and proposed that the continents were once compressed into a single protocontinent which he called Pangaea (meaning "all lands"), and over time they have drifted apart into their current distribution.

8 0

2 years ago

The measures of the three angles of a triangle are given by 18x − 7, 12x + 9, and 4x. What is the measure of the largest angle?

Goryan [66]

Answer:

The greatest angle is $18x-7$

Explanation:

According to angle sum property of a triangle, sum of all the angles of a triangle is equal to $180$ °.

The given angles of a triangle are $18x-7,12x+9,4x$

Therefore,

$18x-7+12x+9+4x=180$ °

$34x+2=180$ °

$34x=178$ °

$x=\frac{178}{34}=\frac{89}{17}$

$18x-7=18(\frac{89}{17})-7=\frac{1602-119}{17}=\frac{1483}{17}$ ≈ 87.2°

$12x+9=12(\frac{89}{17})+9=\frac{1068+153}{17}=\frac{1221}{17}$ ≈ 71.8°

$4x=4(\frac{89}{17})=\frac{356}{17}$ ≈ 20.9°

Therefore, greatest angle is $18x-7$

3 0

2 years ago

Today, continental glaciers are limited to Antarctica and ________.Group of answer choicesGreenlandCanadaAlaskaSiberia

elena-14-01-66 [18.8K]

Answer:

greenland

Explanation:

hope its right

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4 0

2 years ago

Which geologic principle explains why the bottom stratum in a section of rock is the oldest? . . Cross-cutting relationships . .

sergey [27]

Superposition is the geologic principle which explains why the bottom stratum in a section of rock is the oldest. The word literally means placing one thing on top of another where the lower strata are the older.

8 0

3 years ago

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