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3 years ago

Please help!! Figure B is scaled copy of figure A, what is the scale factor from figure A to figure B?

Mathematics

1 answer:

horrorfan [7]3 years ago

6 0

Answer:

scale factor = 2

Step-by-step explanation:

The scale factor is the ratio of corresponding sides, fig. B to fig. A

Consider the horizontal lengths, then

scale factor = $\frac{8}{4}$ = 2

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The perimeter of a shape is the sum of its side lengths.

<em>Joshua miscalculated the third length of the triangle</em>

First, we calculate the third length (x) of the triangle.

Because the triangle is right-angled, we can make use of Pythagoras.

So we have:

$x^2 = 7^2 + 7^2$

$x^2 = 2(7^2)$

Take square roots of both sides

$x = \sqrt{2(7^2)$

$x = 7\sqrt{2$

The other shape in the figure is a square.

So, the perimeter (P) is

$P = 7 + x + x + x + 7$ ---- i.e. the sum of the visible lengths

So, we have:

$P = 7 + 7\sqrt2 + 7\sqrt2 + 7\sqrt2+ 7$

Evaluate like terms:

$P = 14 + 21\sqrt2$

Hence, Joshua's error is that:

<em>He miscalculated the third length of the triangle</em>

Read more about perimeters at:

brainly.com/question/6465134

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2 years ago

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Answer:

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3 years ago

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3 years ago

Which of the following World Record times from Track and Field is least

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vovangra [49]

Answer

<h2>The volume of right rectangular prism 10 cubic inch.</h2>

Step-by-step explanation:

The volume of cube $=a^{3}$

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so,

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3 years ago