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melamori03 [73]
3 years ago
6

What is the square footage of a triangle piece of plastic with a base of 18cm and a height of 25 cm.

Mathematics
1 answer:
jarptica [38.1K]3 years ago
3 0

450 square feet

i hope this helps

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Answer:

#5

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Step-by-step explanation:

Theorems you need:

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#5

Knowing those, you first want to find the triangle's 3 interior angles.

The angles <QSO & <QSR are adjacent (share a common ray) and form a straight line with the outer rays, therefore they add up to 180.

So m<QSO+m<QSR=180.

Rewrite the equation: m<QSR=180-m<QSO

Plug the known value in: m<QSR=180-(3x-17)

Distribution & Combining like terms: m<QSR=180-3x+17=197-3x

Now solve for the 3 interior angles to equal 180.

(197-3x)+(25)+(2x+3)=180

Combine like terms: 225-x=180

Isolate the x term (-225 to both sides): -x=180-225=-45

Isolate the x (×-1 to both sides):

x=45

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