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3 years ago

What is the perimeter? 30 km 22 km 33 km 36 km

Mathematics

1 answer:

Norma-Jean [14]3 years ago

7 0

Answer:

121 km

Step-by-step explanation:

i added all the number together

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Which is not a quadrilateral?

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Answer:

triangle

Step-by-step explanation:

it has 3 sides, not four

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3 years ago

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Step-by-step explanation:

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3 years ago

Regular triangular pyramid has 6 cm long base edge and slant height k=9 cm. Find the lateral area of the pyramid.

gregori [183]

Answer:

81 cm²

Step-by-step explanation:

Since, the lateral face of a triangular pyramid is a triangle,

Given,

The base edge or the base of one lateral face of pyramid, a = 6 cm,

And, the slant height or the height of the face, k = 9 cm,

Thus, the area of one lateral face of the pyramid,

$A=\frac{1}{2}\times a\times k$

$=\frac{1}{2}\times 6\times 9$

$=\frac{54}{2}$

$=27\text{ square cm}$

We know that, a Regular triangular pyramid has 3 lateral faces,

Hence, the total lateral area of the pyramid,

$L.A.=3\times\text{ The area of one lateral face}$

$=3\times 27$

$=81\text{ square cm}$

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3 years ago

Read 2 more answers

Given the following sets.

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A = {0, 1, 2, 3}

C = {0, a, 2, b}

A ∩ C = {0, 2} → E)

A set of the same elements from the set A and the set C.

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3 years ago