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Vladimir79 [104]
3 years ago
7

You are making an umbrella that is shaped like a regular octagonal pyramid.

Mathematics
1 answer:
guajiro [1.7K]3 years ago
8 0

Answer:

80 ft²

Step-by-step explanation:

From the diagram

The umbrella has a total of 8 triangle.

Applying

A = 8(bh)/2

A = 4bh...................... Equation 2

Where A = Amount of fabric, b = base of one of the triangle in the octagonal pyramid, h = height of the triangle.

From the diagram,

Given: b = 4 ft, h = 5 ft

Substitute these values into equation 2

A = 4×4×5

A = 80 ft²

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#18 i can't figure this out
Anon25 [30]

Answer:

∠Q = 75 °

Step-by-step explanation:

Since PR = PQ then Δ PQR is isosceles and the base angles are congruent, that is

∠R = ∠Q = 2x + 15

The sum of the 3 angles in a triangle = 180°

Sum the 3 angles and equate to 180

2x + 15 + 2x + 15 + x = 180, that is

5x + 30 = 180 ( subtract 30 from both sides )

5x = 150 ( divide both sides by 5 )

x = 30

Hence

∠Q = 2x + 15 = (2 × 30) + 15 = 60 + 15 = 75°

4 0
3 years ago
Given a line with slope of -1 and y-intercept of 8, which of the ordered pairs given below would not be on the line? (-1,9) (0,8
vredina [299]

Answer:

(2,10)

Step-by-step explanation:

I wrote an equation for the line given.

y = -x + 8

The slope is -1 and the y-intercept is 8.

The point (2,10) does not lie on the line, while all others do.

See graph.

(2,10) should be correct.

Hope this helps you!

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3 years ago
The perimeter of a playing field for a certain sport is 180 ft. The field is a rectangle, and the length is 40ft longer than the
aleksklad [387]
Width is 25 and Length is 65.
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Solve problem in photo 8th math
morpeh [17]

Answer:

31

Step-by-step explanation:

4 0
3 years ago
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Potatoes are sold by the case. A case will hold 4 eight pound bags. How many pounds of potatoes are in 8 cases?
Naddik [55]

Answer:

256

Step-by-step explanation:

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32*8=256

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