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vitfil [10]
3 years ago
9

Help me solve this (pls show working)

Mathematics
1 answer:
maksim [4K]3 years ago
6 0

Answer:

The area of the polygon is 92.75 cm^2

Step-by-step explanation:

To find the area of the polygon, we simply add up the areas of the constituent triangles

At any point in time;

Area of a triangle = 1/2 * base * height

So we proceed as follows;

(1/2 * 12 * 4.5) + (1/2 * 12 * 5)

= 27 + 30 = 57 cm^2

There is a last triangle with 12 cm and 5 cm as the sides and we need the length of the hypotenuse

The length of the hypotenuse for that triangle will be 13 cm. This is because 5,12 and 13 are Pythagorean triple and they form the sides of a right-angled triangle

So for the last triangle, the area will be;

1/2 * 13 * 5.5 = 35.75 cm^2

So the total area is;

35.75 + 57 = 92.75 cm^2

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Vertical lines m and n are intersected by lines k and j. At the intersection of lines m and k, the bottom right angle is (x minu
Nezavi [6.7K]

Using the same-side interior angles theorem, the values of x and y are:

x = 80

y = 130

<h3>What is the Same-side Interior Angles Theorem?</h3>

The same-side interior angles theorem states that two interior angles on same side of a transversal are supplementary.

(x - 30) and (x + 50) are same-side interior angles, therefore:

(x - 30) + (x + 50) = 180

Solve for x

x - 30 + x + 50 = 180

2x + 20 = 180

2x = 180 - 20

2x = 160

x = 160/2

x = 80

(x - 30) + y = 180

Plug in the value of x

(80 - 30) + y = 180

50 + y = 180

y = 180 - 50

y = 130

Learn more about the same-side interior angles theorem on:

brainly.com/question/13867198

#SPJ1

5 0
2 years ago
The length of a rectangle is 3 1/6 cm longer than the width. The perimeter of the rectangle is 15 1/3 cm. What are the width and
eimsori [14]

Answer:

1212

Step-by-step explanation:

121212212

8 0
3 years ago
Simplify by dividing [ -3/-8] divided by 5/9 (5 points)
rewona [7]

Answer: D

Step-by-step explanation:

(3/8) / (5/9) is the same as multiplying (3/8) by (9/5) which is 27/40. I'm not sure if there's an error between C and D because those are both the same answer since dividing a negative number by a negative number gives you a positive number.

I think C was supposed to be -27/40 so D is the correct answer since it's positive.

3 0
3 years ago
-10a×4b+20a^2b+4ab-6ab​
Vinvika [58]

Step-by-step explanation:

-10a×4b+20a^2b-2ab

-40ab+20a^2b-2ab

-42ab+20a^2b Answer

I'm not sure...

8 0
3 years ago
Arrange these fractions in least to greatest order:
earnstyle [38]
1 6/7 ................
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3 years ago
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