In a quadrilateral ABCD, the measure of the three angles A, B and C of the quadrilateral is 110°, 70° and 80°, respectively. Find the measure of the fourth angle.
Answers
Answered by
26
We know That sum of all angles of a quadrilateral is equal to 360°
=> A+B+C+D=360°
=> 110°+70°+80°+D=360°
=> 260°+D=360°
=>D=360°-260°
=> D = 100°
∴ The fourth angle is 100°
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Answered by
10
Answer:
Angle D =100°
Step-by-step explanation:
Since the sum of all the angles of a quadrilateral is 360°
Therefore,
angle A + angle B +angle C+ angle D=360
110 +70 + 80 + angle D =360
angle D = 360 - (110+70+80)
angle D = 100
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