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Gelneren [198K]
3 years ago
11

Help plz!!! 68 Points!!

Mathematics
1 answer:
Mariana [72]3 years ago
5 0

Answer:

Refer below explanation.

Step-by-step explanation:

Given :  two triangles ∆QPK and ∆LMK.

We have to show  ∆QPK ≅ ∆LMK.

Two triangles are similar if ratio of the corresponding sides are equal and measure of corresponding angles are equal.

Statement 1)

QK=16, PK=26, MK=65, KL=40 ( Reason: Given)

Statement 2 )

\frac{QL}{KL}=\frac{16}{40} \\\\\frac{PK}{KM} =\frac{26}{65}

(reason : ratio of corresponding sides)

Statement 3)

\frac{QL}{KL}=\frac{16}{40}=\frac{2}{5} \\\\\frac{PK}{KM} =\frac{26}{65}=\frac{2}{5}

Thus, \frac{QL}{KL}=\frac{PK}{KM} =\frac{2}{5}

(reason: simplify ratios)

Statement 4)

∠MKL = ∠PQK (reason : Vertically opposite angles)

Statement 5)

∆QPK ≅ ∆LMK (reason : Side-angle-side)

Side angle side similarity criterion states that two angles are similar if the ratio of their corresponding sides and angle between these sides are equal then triangles are similar.




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Pls help! <br> and a reason.
Rasek [7]

Answer:

\angle BDA = 72^{\circ}

\angle DAB = 36^{\circ}

\angle BDC = 108^{\circ}

\angle BCD = 36^{\circ}

\angle DBC = 36^{\circ}

Step-by-step explanation:

Given

\angle ABD = 72^{\circ}  

Required

Determine the missing angles

Since AB = AD, then:

\angle ABD = \angle BDA --- Base angles of an isosceles triangle

Hence:

\angle ABD = \angle BDA = 72^{\circ}

\angle ABD + \angle BDA + \angle DAB = 180^{\circ} --- angles in a triangle

72^{\circ} + 72^{\circ} + \angle DAB = 180^{\circ}

144^{\circ} + \angle DAB = 180^{\circ}

Collect Like Terms

\angle DAB = 180^{\circ} - 144^{\circ}

\angle DAB = 36^{\circ}

\angle BDA + \angle BDC = 180^{\circ} --- angle on a straight line

72^{\circ} + \angle BDC = 180^{\circ}

\angle BDC = 180^{\circ} - 72^{\circ}

\angle BDC = 108^{\circ}

Since ABC is isosceles, then:

\angle DAB = \angle BCD = 36^{\circ} --- base angle of isosceles

\angle BCD = 36^{\circ}

Lastly:

\angle BCD + \angle BDC + \angle DBC = 180^{\circ}

36^{\circ} + 108^{\circ} + \angle DBC = 180^{\circ}

\angle DBC = 180^{\circ} - 36^{\circ} - 108^{\circ}

\angle DBC = 36^{\circ}

<em>See attachment</em>

3 0
3 years ago
PLEASE HELP!! WILL MARK BRAINLIEST!
viva [34]

From the graph and orientation of the parametric equations: A. the graph is a circle with a radius of 4. The orientation is counterclockwise as t increases.

<h3>How to find a polar function?</h3>

In geometry, the relationship between the rectangular coordinates (x, y) and polar coordinates (r, t) is given by these polar functions:

x = rcost and y = rsint.

<u>Where:</u>

  • t is the angle.
  • r is the radius of a circle.

Mathematically, the standard form of the polar equation of a circle is given by;

x² + y² = r²

<u>Given the following data;</u>

x = 16cost  ⇒ x² = 16cos²t

y = 16sint   ⇒ y² = 16sin²t

Evaluating, we have:

x² + y² = 16

r² = 16

r = √16

Radius, r = 4.

Also, the orientation is counterclockwise as t increases because the angle gets bigger (increases).

<h3>How to determine polar form of the parametric equations?</h3>

x = 3t    .....equation 1.

y = t²     .....equation 2.

Making t the subject of formula in eqn. 1, we have:

t = x/3    .....equation 3.

Substituting eqn. 3 into eqn. 2, we have:

y = (x/3)²

rsinθ = (rcosθ/3)²

rsinθ = r²cos²θ/9

9rsinθ = r²cos²θ

9sinθ = rcos²θ

r = 9sinθ/cos²θ

r = 9 × (sinθ/cosθ) × 1/cosθ

r = 9tanθsecθ.

Read more on polar coordinates here: brainly.com/question/2193539

#SPJ1

4 0
2 years ago
Jessie wants to find out what type of music her fellow students enjoy the most. She asks her classmates: "What is your favorite
iogann1982 [59]
Country cause it's good
5 0
3 years ago
Pythagorean theorem problem <br><br> b = 2.1, c = 2.9
prisoha [69]
The answer to this question is 2.
Hope this helps!
4 0
4 years ago
A scientist conducting an experiment creates a table to record the growth of two plants. The scientist uses the equations below
aivan3 [116]
Plant 1 in 5th week = 1.75 + 1/2 (5) = 1.75 + 2.5 = 4.25
Plant 2 in 5th week = 1.75 + 3/4 (5) = 1.75 + 3.75 = 5.50

So, Difference = 5.50 - 4.25 = 1.25

In short, Your Answer would be Option B

Hope this helps!
7 0
3 years ago
Read 2 more answers
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