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mestny [16]
3 years ago
12

Please need help asap!!

Mathematics
2 answers:
evablogger [386]3 years ago
7 0

Convex quadrilaterals have a total of 360* when you add up all the angles. But you have to remember that convex angles are always 180* or less. This means that angles A, B, and C are all convex. If you add all the given angle measurements you get 248*. 360-248= 112*. So, your answer is C.

coldgirl [10]3 years ago
5 0

The measures of the interior angles of a quadrilateral add up to 360 degrees, so make angles A, B, C, and x add up to 360 in an equation and solve for x, the missing angle.

(80) + (98) + (70) + x = 360

Combine like terms.

248 + x = 360

Subtract 248 from both sides.

x = 112

C) 112 degrees

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Answer:

AB = 21 is the measurement.

Step-by-step explanation:

It is given in the question that B is the mid point of AC.

AB = x + 5 and BC = 2x -11

Since B is the midpoint of AC, therefore AB = BC

x + 5 = 2x - 11

2x - x = 11 + 5 = 16

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Step-by-step explanation:

~ The technique of dividing a quantities into equivalent portions as well as    determining however many equal components may be formed, is determined as a division.

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