Two angle of a quadrilateral measure 140 and 80. the other two angels are in a ratio of 3:4. what is the value of x? what are the measures of those two angles?

60° and 80°

Step-by-step explanation:

The sum of the interior angles of a quadrilateral = 360°

Given 2 angles in ratio 3 : 4 = 3x : 4x ( x is a multiplier )

Sum the 4 angles and equate to 360

140 + 80 + 3x + 4x = 360, that is

220 + 7x = 360 ( subtract 220 from both sides )

7x = 140 ( divide both sides by 7 )

x = 20

Thus

3x = 3 × 20 = 60° and 4x = 4 × 20 = 80°

answer: d. $20

step-by-step explanation:

just took the test

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