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3 years ago

8.4 cm

Mathematics

1 answer:

IRISSAK [1]3 years ago

5 0

Answer:

F 575.3

Step-by-step explanation:

we substitute nothing else

by using the rule 2πrh

2*π*8.4*10.9

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Step-by-step explanation:

Given

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Required

Determine the coordinates of A

Midpoint is calculated as thus:

$M(x,y) = (\frac{A_x + C_x}{2}, \frac{A_y + C_y}{2})$

Substitute the given values

$(25.5,60.1) = (\frac{A_x + 18.3}{2}, \frac{A_y + 72.5}{2})$

Multiply through by 2

$2 * (25.5,60.1) = (\frac{A_x + 18.3}{2}, \frac{A_y + 72.5}{2}) * 2$

$2 * (25.5,60.1) = (A_x + 18.3, A_y + 72.5)$

$(51,120.2) = (A_x + 18.3, A_y + 72.5)$

By comparison:

$A_x + 18.3 = 51$

$A_y + 72.5 = 120.2$

$A_x + 18.3 = 51$

$A_x = 51 - 18.3$

$A_x = 32.7$

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$A_y = 120.2 - 72.5$

$A_y = 47.7$

Hence:

$A = (32.7,47.7)$

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3 years ago