2 years ago

Which is a counterexample for the conditional?

Mathematics

1 answer:

Murljashka [212]2 years ago

4 0

Answer:

No because squares and rectangles are a type of polygon.

Step-by-step explanation:

A polygon is any shape with straight sides.

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2 years ago

If u add 5 to me and then divide by 9,u get 3. What number amI?

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3 years ago

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The following picture is a square pyramid where DE=8 cm and m∠ADE=60°.

mr_godi [17]

Answer:

131 cm

Step-by-step explanation:

formula for surface area of pyramid is

S = (1/3)Bh

but the base ia a square, so B = $x^{2}$

S = (1/3) $x^{2} h$

the pic shows h = 8

but we don't know x

do SohCahToa

sin60 = x/8

x = 8sin60

x = 6.92820323 or 7

plug in numbers

S = (1/3) $7^{2}$ 8

S = 392/3

S = 130.6666667 or 131 cm

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2 years ago