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Murljashka [212]
3 years ago
7

Which statements describe a parallelogram that must be a square? Select each correct answer.

Mathematics
2 answers:
Oxana [17]3 years ago
8 0

That would be B, C and E.

A and D could be a rhombus.

DiKsa [7]3 years ago
4 0

Answer:

(D) and (E)

Step-by-step explanation:

From the properties of square, we know that all the four sides of the square are always congruent, the diagonals of the square are always equal and the four angles of the square are equal and are of the measure 90°.

Therefore, from the options, D and E are the correct ones because the sides of square are congruent and the angles are also congruent but the diagonals are not perpendicular.

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-2|7 - 9c| + 7 = -15<br><br>Solve for C
IgorLugansk [536]

Solve for c by simplifying both sides of the equation, then isolating the variable.

Exact form: c = -4/9, 2

Decimal form: c = -.4, 2

5 0
3 years ago
URGENT! PLEASE HELP.
uysha [10]

Answer: a) BC = 1386.8 ft

b) CD = 565.8 ft

Step-by-step explanation:

Looking at the triangle,

AD = BD + 7600

BD = AD - 7600

Considering triangle BCD, we would apply the the tangent trigonometric ratio.

Tan θ = opposite side/adjacent side. Therefore,

Tan 24 = CD/BD = CD/(AD - 700)

0.445 = CD/(AD - 700)

CD = 0.445(AD - 700)

CD = 0.445AD - 311.5 - - - - - - - -1

Considering triangle ADC,

Tan 16 = CD/AD

CD = ADtan16 = 0.287AD

Substituting CD = 0.287AD into equation 1, it becomes

CD = 0.445AD - 311.5

0.287AD = 0.445AD - 311.5

0.445AD - 0.287AD = 311.5

0.158AD = 311.5

AD = 311.5/0.158

AD = 1971.52

CD = 0.287AD = 0.287 × 1971.52

CD = 565.8 ft

To determine BC, we would apply the Sine trigonometric ratio which is expressed as

Sin θ = opposite side/hypotenuse

Sin 24 = CD/BC

BC = CD/Sin24 = 565.8/0.408

BC = 1386.8 ft

4 0
3 years ago
Which statement is TRUE?
Schach [20]
I think the answer is B
7 0
3 years ago
Plz help ASAP! Algebra 1 question. I will mark brainiest and give 50 points.
Musya8 [376]

Answer:

it is 20x - 11 = 5x + 11

Step-by-step explanation:

hope this help :)

8 0
3 years ago
Read 2 more answers
Find the x in each triangle<br>HELP NOW!!!! PLSSS
Ilia_Sergeevich [38]

Answer:

8 CM

Step-by-step explanation:

(Hypotenuse)²=(Base)²+(Height)²

10²=X+6².

100=X+36

100-36=X ( by transposition method )

√64=X

8=X

6 0
3 years ago
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