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kirill115 [55]
3 years ago
13

Write a paragraph proof. Given: ∠T and ∠V are right angles. Prove: ∆TUW ∆VWU

Mathematics
2 answers:
Veseljchak [2.6K]3 years ago
8 0

Step-by-step explanation:

in ∆TUW & ∆VWU

∠UTW = ∠UVW (data / given)

WU = WU (common sides) ∠TWU = ∠VUW (TW//UV alternate∠ )

so ∆TUW & ∆VWU are congruent

Oduvanchick [21]3 years ago
5 0

Answer:

∆TUW≅∆VWU by AAS.

Step-by-step explanation:

Given information: ∠T and ∠V are right angles, TW║UV.

Prove: ∆TUW≅∆VWU

Proof:

If a transversal line intersect two parallel lines, then alternate interior angles are congruent.

In ∆TUW and ∆VWU,

\angle T\cong \angle V                 (Right angles)

\angle TWU\cong \angle VUW                 (Alternate interior angles)

UW\cong UW                     (Reflection property)

By AAS postulate, ∆TUW and ∆VWU are congruent.

\triangle TUW\cong \triangle VWU

Hence proved.

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Please help numbers 28, 30, 32, 34
Juliette [100K]
<h3>28.</h3>

The path of any fair ball will divide the 90° angle between foul lines into complementary angles. The angle with the first-base foul line is ...

... 90° -27° = 63°

<h3>30.</h3>

The attached picture shows the two angles "constructed" using a protractor. It is not possible to construct a 97° angle with compass and straight-edge

<h3>32.</h3>

Let x represent the measure of the complement. Then the angle that is 6° less than the meaure of the complement is x-6°. The angle and its complement total 90°, so we have ...

... (x-6°) + (x) = 90°

... 2x - 6° = 90° . . . . . simplify

... 2x = 96° . . . . . . . . .add 6°

... x = 48° . . . . . . . . . . divide by 2

... (x-6°) = 48°-6° = 42°

The angles are 42° and 48°.

<h3>34.</h3>

Let x represent the measure of the angle. Then its supplement is 180°-x, and half that is (180°-x)/2. The angle is 3° more than this, so we have

... x = (180° -x)/2 +3°

... x -3° = (180° -x)/2 . . . . subtract 3°

... 2x -6° = 180° -x . . . . . .multiply by 2

... 3x -6° = 180° . . . . . . . .add x

... x - 2° = 60° . . . . . . . . . divide by 3 to get x by itself

... x = 62° . . . . . . . . . . . . add 2°

... The supplementary angle is 180° -62° = 118°, half of which is 59°.

One angle is 62°; half the measure of its supplement is 59°; it supplement is 118°.

5 0
4 years ago
Calculate size of angle x. I worked out CA=14cm
nikdorinn [45]

Answer:

∠x = 13.43°

Step-by-step explanation:

area ΔABC = 1/2 ( BD x AC) = 1/2 (22 x AC) = 42

22 x AC = 84        AC = 84/22 = 42/11 = 3.82

CD = BD - BC = 22 - 6 = 16

AD² = AC² + CD² = (3.82)² + 16² = 270.59

AD = 16.45

sin ∠x = AC / AD = 3.82 / 16.45 = 0.2322

∠x = 13.43°

5 0
3 years ago
What is the value of x, when 10(x + 2) = 5(x + 8)?
olga_2 [115]
Solve for x:
10 (x + 2) = 5 (x + 8)

Expand out terms of the left hand side:
10 x + 20 = 5 (x + 8)

Expand out terms of the right hand side:
10 x + 20 = 5 x + 40

Subtract 5 x from both sides:
(10 x - 5 x) + 20 = (5 x - 5 x) + 40

10 x - 5 x = 5 x:
5 x + 20 = (5 x - 5 x) + 40

5 x - 5 x = 0:
5 x + 20 = 40

Subtract 20 from both sides:
5 x + (20 - 20) = 40 - 20

20 - 20 = 0:
5 x = 40 - 20

40 - 20 = 20:
5 x = 20

Divide both sides of 5 x = 20 by 5:
(5 x)/5 = 20/5

5/5 = 1:
x = 20/5

The gcd of 20 and 5 is 5, so 20/5 = (5×4)/(5×1) = 5/5×4 = 4:

Answer:  x = 4
6 0
3 years ago
Read 2 more answers
Describe the error in the following procedure ​
Luden [163]
They didn’t use the distributive property correct because they didn’t multiply 5x3
5 0
4 years ago
A tree casts a shadow of 28 feet. at the same time, a biologist who is 7 feet tall casts a shadow of 2 feet.
lilavasa [31]
Ratio of shadow to object's size = 2/7

Then, size of tree would be: 7/2 * 28 = 7 * 14 = 98 feet

So, your final answer is 98 feet

Hope this helps!
7 0
3 years ago
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