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loris [4]
3 years ago
12

Prove : ABCD is a parallelogram. (need help fast I will mark you brainiest!)

Mathematics
1 answer:
Dovator [93]3 years ago
6 0

Answer:

Parallelogram = 2 pairs of parallel sides and opposite angles are equal

Triangle BEA and triangle DFC are equivalent by side angle side

Therefore, angle DCF is equivalent to angle BAE

Angles FEB and DFE are right angles due to them being supplementary angles with angles BEA and DFC, respectively.

This means triangles BEC and DFA are equivalent.

This means angles FCB and EAD are equivalent, which means angles BCD and DAB are equivalent.

This also means angles ABC and ADC are equivalent.

Opposite angles equivalent = parallelogram

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An eraser is in the shape of a triangular prism. Its dimensions are shown in the diagram. What is surface area of the
Colt1911 [192]

Answer:

6000 square millimeters

Step-by-step explanation:

Side length of the slanting side can be calculated using the Pythagorean theorem,

L = sqrt(30^2+40^2) = 50

sufrace area of a triangular prism

= surface area of the end sections + the surface area of the three side faces

= 2*(30*40/2) + 40*(30+40+50)

= 1200 + 4800

= 6000 mm^2

4 0
3 years ago
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natka813 [3]

Answer:

I don’t know

Step-by-step explanation:

6 0
3 years ago
Plz answer it’s an iready
Dafna11 [192]

Answer:

6(6x + 4y), 12(3x + 2y), 4(9x + 6y)

Step-by-step explanation:

The expressions are equivalent to 36x + 24 y

Hope this helps! :)

5 0
2 years ago
Help me ASAP PLEASE
tamaranim1 [39]

Answer:

Your(my) number is 40

Step-by-step explanation:

I. Given 80/something, + 13, * 5 = 75 when x is something

So [  \frac{80}{x} + 13 ]5 = 75

     [ \frac{400}{x} + 65] = 75

     \frac{400}{x} = 75 - 65

     \frac{400}{x}  = 10

     400 = 10x

        x = 40

II. Prove by replace 40 in x

    [(80/40) + 13]5 = 75

    [2 + 13] 5 = 75

    (15)5 = 75

        75 = 75 true

Ask me for anything.

5 0
2 years ago
What is the value of x and y?
aksik [14]

Answer:

Any thing u want

Step-by-step explanation:

The value of y is 25 means, in this equation, no matter what value you choose for x, y will always equal 25. So x can be anything you want.

7 0
3 years ago
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