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jekas [21]
3 years ago
6

So I took a test from my teachers desk and took photos of the test questions. I am indeed cheating but I just want to know the a

nswers for the test before I take it tomorrow. Here is number 13.
It is Geometry pls help.

Mathematics
1 answer:
dsp733 years ago
5 0

Answer:

THE CORRECT OPTION IS A) ΔABC \sim Δ BDC \sim Δ ADB

Step-by-step explanation:

To be the similarity of any two triangles their corresponding angles should be congruent and their sides are proportional. From the given options only first option satisfies the proportionality of triangles .

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Find sin x/2, cos x/2, and tan x/2, if cos x = -12/13, 180 degrees is less than x which is less than 270 degrees
Rashid [163]
Cos x = -12/13
sin x = -sqrt(13^2 - 12^2) / 13 = -5/13
tan x = 5/12

tan x/2 = (1 - cos x) / sin x = 1 - (-12/13) / -5/13 = 25/13 * -13/5 = -5

2sin^2 x/2 = 1 - cos x = 1 - (-12/13) = 25/13
sin^2 x/2 = 25/13 / 2 = 25/26
sin x/2 = 5/√26

sin x/2 / cos x/2 = tan x/2
cos x/2 = sin x/2 / tan x/2 = 5/√26 / -5 = -1/√26

sin x/2 = 5/√26
cos x/2 = -1/√26
tan x/2 = -5
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Delia has 3 5/8 yards of ribbon. About how many 1/4 yard-long pieces can she cut?
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Wait is it not at all 14.5 or 14 1/2 Because with the math I did I got 14 1/2

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If you could help me on all of them you a live saver
PtichkaEL [24]

Answer:

(1.37) AUB = { 1,2,3,4,5,6}

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(1.39)BUC = { 1,2,3,4,5,6}

(1.40) { 2,4 }

(1.41) { 1,3,5 }

(1.42) { phi }

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(1.44) { phi }

(1.45) {1,2,3,4,5}

(1.46) { 1,2,3,4,5 }

\huge\underline\red{Hope\:that\:helps}

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