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Alika [10]
3 years ago
12

Surface area of the 3D shape figure cm2

Mathematics
1 answer:
monitta3 years ago
3 0

Answer:

152 squared cm

Step-by-step explanation:

You divide the figure into 2 shapes. A triangular pyramid, and a rectangular prism. Find the surface are of each, and add them together.

Triangular pyramid

1. Find surface area of one triangle and multiply by 4, since there are four of the congruent triangles.

5(height) times 4(base of triangle) divided by 2

You get 10, then multiply 10 by 4, because there are 4 congruent triangles.

Figure 1 = 40 cm2

Rectangular Prism

4 times 4 = 16 (base surface area)

6 times 4 = 24 (area of one side)

24 times 4 = 96 (surface area of all 4 sides)

96(surface area of all 4 sides) + 16(surface area of base) = 112

40(surface area of pyramid) + 112(surface area of prism) = 152 cm2

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3 years ago
Can anyone help me plz?
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==================================================

Explanation:

SAS stands for Side Angle Side. Note how the angle is between the two sides. To prove the triangles congruent with SAS, we need to know two sides and an angle between them.

We already see that BC = CD as shown by the tickmarks. Another pair of sides is AC = AC through the reflexive theorem.

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It turns out that the angles are congruent only when they are 90 degrees each, leading to AC being perpendicular to BD. We write this as \overline{AC} \perp \overline {BD}. The upside down T symbol meaning "perpendicular" or "the two segments form a right angle".

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2 years ago
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4 0
3 years ago
Need help on question please!!
Zepler [3.9K]

you'd use the pythagorean theorem.

a^2+b^2=c^2

a is the first leg, b is the second leg, and c is the third leg.

10^2+13^2=c^2

100+169=c^2

269=c^2

take the square root of both sides

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3 0
3 years ago
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NO LINKS. Find the measure of the angle or arc indicated. Part 2<br>​
sergeinik [125]

9514 1404 393

Answer:

  14.  C) 136°

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Step-by-step explanation:

Inscribed angles are half the measure of the arc they intercept. For an inscribed quadrilateral, this means opposite angles are supplementary.

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14) ∠H +∠W = 180°

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  arc VX = 2(34x) = 68(2) = 136 . . . degrees

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15) The sum of angles in the triangle is 180°.

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  ? = 40° . . . . . . . . . . subtract 140°

6 0
2 years ago
Read 2 more answers
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