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scoundrel [369]
3 years ago
11

Find the value of X.

Mathematics
1 answer:
Shalnov [3]3 years ago
6 0

Answer:

78°

Step-by-step explanation:

This is a isosceles trapezoid which means the the top angles are equal to each other and the bottom angles equal to each other

Also the sum of one bottom angle + top angle = 180 so we can say a + 102 = 180 therefore a = 78°

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Answer:

Top Left, Top Right, Bottom Middle, Bottom Right

Step-by-step explanation:

The square in the joint of the angle indicates a right angle.

8 0
2 years ago
Read 2 more answers
HELP PLEASE FAST!! ILL GIVE 5 STARS :))))
VMariaS [17]
Use substitution when either and x or y is given, for instance: x = 2y + 3 or y = 8x - 9.

Use elimination when a number from both equations can cancel each other out, for example:
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Hope this helps!
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3 years ago
The difference of two times a number and five is eight more than the number
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Add it then x it by 3
4 0
3 years ago
Find a side of an equilateral triangle with a 12 inch altitude
saveliy_v [14]
Since the triangle is an equilateral triangle we know all of it's sides must be the same length, with that in mind the angles that make up the triangle must be equal as well. Knowing that a triangle's three interior angles make up 180 degrees we know that the size of each angle must be one third of this (as each angle must be equal).

180/3 = 60


then we may split the triangle along it's altitude into two special right triangles
more specifically two 30-60-90 triangles.

this means that the side with 30 degrees will be some value "x" where the side for 60 degrees will be related as it is "x*sqrt(3)" and the hypotenuse (which would be the side of the triangle) would be proportionally "2x"

this would mean that the altitude is the side associated with the 60 degree angle as such we can solve for "x" using this.

12= x*sqrt(3)
12/sqrt(3)=x
4sqrt(3)=x  (simplifying the radical we get "x" equals 4 square root 3)

now we may solve for the side length of the triangle which is "2x"

2*4sqrt(3) ->   8sqrt (3)  

eight square root of three is the answer.
8 0
3 years ago
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