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USPshnik [31]
3 years ago
12

Find the measure of the numbered angles in rhombus ABCD

Mathematics
1 answer:
sasho [114]3 years ago
3 0

Answer:

see the explanation

Step-by-step explanation:

we know that

In a Rhombus opposite angles are congruent and consecutive angles are supplementary

The diagonals are perpendicular and bisect the angles

so

step 1

Find the measure of angle 4

we know that

m\angle 4=27^o --->by the diagonals bisect the angles

step 2

Find the measure of angle 1

we know that

m\angle 1=27^o ----> by opposite angles are congruent

step 3

Find the measure of angle 2

we know that

m\angle 1=m\angle 2 ----> by the diagonals bisect the angles

so

m\angle 2=27^o

step 4

Find the measure of angle 3

we know that

m\angle 3=90^o ----> by the diagonals are perpendicular

step 5

Find the measure of angle 5

we know that

m\angle 5+27^o=90^o ----> by complementary angles

m\angle 5=90^o-27^o=63^o

step 6

Find the measure of angle 6

we know that

m\angle 6=m\angle 5 ----> by the diagonals bisect the angles

m\angle 6=63^o

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elena-14-01-66 [18.8K]

Answer:

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Step-by-step explanation:

6 0
3 years ago
A surveyor is measuring the distance across a lake as shown below. In triangle ABC , M and are midpoints . What is the width acr
Triss [41]

Answer:

64 yds

Step-by-step explanation:

by proportion, MN is half way to BC, so BC = 2(MN) = 64 yds

8 0
3 years ago
Janice receives $.40 per pound for 1 to 99 pounds of aluminum cans he recycles. he receives $.50 per pound if you are cycles mor
Ilya [14]

Answer:

M=\left\{\begin{matrix}0.4x &x\leq99 \\ 0.5x &x>100 \\ \end{matrix}\right.

Step-by-step explanation:

<u>Function modeling</u>

Real-life situations often require the help of mathematics to model numerically what happens when the variables involved can change. It could even be used to predict some expected outcomes from those models.

The problem states Janice receives $.40 per pound when he recycles less or equal than 99 pounds of aluminum. If x is the number of recycled pounds, then the amount of money he receives is

M=0.4x

We also know that if he recycles more than 100 pounds of aluminum, the pay increases to $0.5 per pound. In that case, the amount of money is

M=0.5x

This is a case where the function is defined differently depending on the conditions of the input variable x. It's called a piecewise function. The function can be written as

M=\left\{\begin{matrix}0.4x &x\leq99 \\ 0.5x &x>100 \\ \end{matrix}\right.

Note the function is not well constructed because there is a gap for x=100 where M is not defined. If we establish that for 100 pounds the payment is $0.5, then the second piece would include x=100

5 0
3 years ago
Chuck left his house to ride his bike in a path like the right triangle
mart [117]
It would be 10 miles since we use Pythagorean Theorem
5 0
3 years ago
Find, correct to four decimal places, the length of the curve of intersection of the cylinder 16x2 + y2 = 16 and the plane x + y
Yuri [45]

Let the curve C be the intersection of the cylinder  



16x^2+y^2=16



and the plane



x+y+z=1



The projection of C on to the x-y plane is the ellipse



16x^2+y^2=16



To see clearly that this is an ellipse, le us divide through by 16, to get



\frac{x^2}{1}+ \frac{y^2}{16}=1



or  



\frac{x^2}{1^2}+ \frac{y^2}{4^2}=1,



We can write the following parametric equations,



x=cos(t), y=4sin(t)



for  



0\le t \le 2\pi



Since C lies on the plane,



x+y+z=1



it must satisfy its equation.



Let us make z the subject first,  



z=1-x-y



This implies that,



z=1-sin(t)-4cos(t)



We can now write the vector equation of C, to obtain,



r(t)=(cos(t),4sin(t),1-cos(t)-4sin(t))



The length of the curve of the intersection of the cylinder and the plane is now given by,



\int\limits^{2\pi}_0 {|r'(t)|} \, dt



But  



r'(t)=(-sin(t),4cos(t),sin(t)-4cos(t))



|r'(t)|=\sqrt{(-sin(t))^2+(4cos(t))^2+(sin(t)-4cos(t))}



\int\limits^{2\pi}_0 {\sqrt{2sin^2(t)+32cos(t)-8sin(t)cos(t)} }\, dt=24.08778184



Therefore the length of the curve of the intersection  intersection of the cylinder and the plane is 24.0878 units correct to four decimal places.

6 0
3 years ago
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