A triangular pyramid. The triangular base has a height of 8 units and base of 12 units. 2 sides have a base of 10 and height of 14. 1 side has a base of 12 and height of 13.6. Find the surface area of the pyramid. The triangular base has a height of 8 units and a base of 12 units. What is the base area? What is the lateral area? What is the surface area?

Base area of the triangular pyramid is 96 square units.

Lateral surface area of the triangular pyramid is 221.6 square units.

Surface area of the triangular pyramid is 317.6 square units.

Step-by-step explanation:

Base area = 8 x 12

= 96 square units

Base area of the triangular pyramid is 96 square units.

Lateral surface area = 2[(1/2) 10x 14] + (1/2) (12 x 13.6)

= 2(70) +81.6

= 140 + 81.6

= 221.6 square units

Lateral surface area = 221.6 square units

Lateral surface area of the triangular pyramid is 221.6 square units.

Surface area= 221.6 + 96

= 317.6 square units

Surface area of the triangular pyramid is 317.6 square units.

m

step-by-step explanation:

20/27

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step-by-step explanation:

1 simplify brackets

-\frac{8}{9}\times \frac{5}{6}−

​9

​

​8

​​ ×

​6

​

​5

​​

2 use this rule: \frac{a}{b}\times \frac{c}{d}=\frac{ac}{bd}

​b

​

​a

​​ ×

​d

​

​c

​​ =

​bd

​

​ac

​​

-\frac{8\times 5}{9\times 6}−

​9×6

​

​8×5

​​

3 simplify 8\times 58×5 to 4040

-\frac{40}{9\times 6}−

​9×6

​

​40

​​

4 simplify 9\times 69×6 to 5454

-\frac{40}{54}−

​54

​

​40

​​

5 simplify \frac{40}{54}

​54

​

​40

​​   to \frac{20}{27}

​27

​

​20

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