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2 years ago

A student solved the following problem and made an error:

Mathematics

1 answer:

liubo4ka [24]2 years ago

8 0

All the steps were correct except the final statement. The mistake was in Line 6.

Line 6 triangle ABC is congruent to triangle EFD by SAS.

<span>This does not follow. The SAS postulate states that if two sides and the included angle of one triangle is congruent to two sides and the included angle of another triangle. The student only proved that one side of the triangle (AC) is congruent to the side of another triangle (EF) .</span>

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Hiii please help i’ll give brainliest if you give a correct answer tysm!

ANTONII [103]

Answer:

Step-by-step explanation:

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2 years ago

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A salesman travelled 2/5 of his journey before lunch and 3/8 of his journey after lunch.

AysviL [449]

2/5+3/8= 31/40 therefore he still has 9/40 to go.
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then you cross multiply the two numerators
2x8=16
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to get the final
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and you are left with 9/40

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3 years ago

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katen-ka-za [31]

Answer:

Step-by-step explanation:

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Kamila [148]

The relationship between the trigonometric ratios are cos(X) = cos(A), cos(Y) = cos(C) and cos(Z) = cos(B)

<h3>The relationship between the trigonometric ratios</h3>

The given parameters are:

Scale factor of dilation, k = 2
cos(X) = 2.5/5/59

Since the transformation is a dilation, it means that both triangles are similar.

So, we have:

cos(X) = cos(A), cos(Y) = cos(C) and cos(Z) = cos(B)

<h3>The segments AC and AB. </h3>

In (a), we have:

Both triangles are similar.

This means that the corresponding points are:

X and A

Y and C

Z and B

So, we have:

AC = 2 * XY

AB = 2 * XZ