Mathematics, 18.07.2019 00:00 akepa

Me i don't know how to do this identify the lateral area and surface area of a regular triangular pyramid with base edge length 14 cm and slant height 15 cm. identify the lateral area and surface area of a regular hexagonal pyramid with base edge length 60 m and slant height 35 m.

Answers: 1

Show answers

Answers

Area of each lateral area = 1/2 * 14* 15
Total lateral area ( as it has 3 lateral sides) = 3 * 1/2 * 14 * 15 = 315 cm^2

Total surface area = 315 * 1/2 * 14 * 15 = 420 cm^2

Hexagonal pyramid

Lateral area = 6 * area of each triangle = 6 * 1/2 *10 * 35 = 1050 cm^2

Total S A = 1050 + area of the hexagonal base = 1050 + 3 sqrt3 10^2 / 2
= 1050 + 259.8 = 1309.8 cm^2

Answer from: derrekdream123

L = 315 cm2 ; S = 399.9 cm2

Step-by-step explanation:

The lateral area of a regular pyramid with perimeter P and slant height l is L=12Pl.

The figure shows a regular triangular pyramid.

Substitute the known value of the base edge length s=14 cm into the formula for the perimeter of the regular triangle P=3s.

P=3(14)=42 cm

Therefore, P=42 cm.

Substitute the known values of the perimeter P=42 cm and the slant height l=15 cm into the formula for the lateral area if a regular pyramid L=12Pl.

L=12(42)(15)=315 cm2

Therefore, the lateral area of the pyramid is 315 cm2.

The surface area of a regular pyramid with lateral area L and base area B is S=L+B, or S=12Pl+B.

The base of the regular triangular pyramid is the equilateral triangle. The area of the triangle with the base b and the height h is B=12bh.

The figure shows an equilateral triangle. The side of the triangle is 14 centimeters long. The angle between the altitude and the side of the triangle measures 30 degrees. Angles between the sides of the triangle measure 60 degrees.

The height is determined by recognizing that it is the long leg of a 30°−60°−90° right triangle. So, the length of the height is 3√2 times the length of the side.

Thus, h=12·3‾√·14

Multiply.

h=73‾√ cm

Therefore, h=73‾√ cm.

Substitute the known values b=14 cm and h=73‾√ cm into the formula for the area of the triangle.

B=12(14)(73‾√)=493‾√ cm2

Therefore, B=493‾√ cm2.

To calculate the surface area of the pyramid, substitute the known values into the formula for surface area. Simplify. Round your answer to the nearest tenth.

S=315+493‾√≈399.9 cm2

Therefore, the surface area of the pyramid is about 399.9 cm2.

Answer from: Quest

c is the answer

step-by-step explanation:

Answer from: Quest

1. 3. can also be expressed as (22/7)

2. -4.5

3. 3.6

happy to

pls mark as brainliest

Ineed to know if i got my answers right or not i will mark brainliest

Another question on Mathematics

Mathematics, 21.06.2019 16:30

To which set of numbers does the number –5 belong? select all that apply. integers natural numbers rational numbers real numbers whole numbers

Answers: 1

Answer

Mathematics, 21.06.2019 19:00

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

Answers: 1

Answer

Mathematics, 21.06.2019 21:50

5. which description does not guarantee that a quadrilateral is a squar ajo is a parallelogram with perpendicular diagonals 0% has all sides congruent and all angles congruent o has all right angles and has all sides congruent 10% is both a rectangle and a rhombus 30%

Answers: 2

Answer

Mathematics, 21.06.2019 23:00

Acompany made a profit of 75000 over a period of 6 years on an initial investment of 15000 what is the annual roi

Answers: 1

Answer

You know the right answer?

Me i don't know how to do this identify the lateral area and surface area of a regular triangular p...

Questions

Engineering, 06.05.2020 01:20

Stan needs 15 gallons of gasoline to top off his automobile’s gas tank. If he drives an extra eight miles (round trip) to a gas station on the outskir...

Mathematics, 06.05.2020 01:20