Grade 128 grade maths
A quadrilateral has three acute angles, each measure 80°. What is the measure of the fourth angle?
A quadrilateral has three acute angles, each measure 80°. What is the measure of the fourth angle?
1 Answer
Harshit Singh
Dear Student
Let x be the measure of the fourth angle of a quadrilateral.
Sum of the four angles of a quadrilateral = 360°
80° + 80° + 80° + x = 360°
x = 360°– (80°+ 80°+ 80°)
x = 360°– 240°
x = 120°
Hence, the fourth angle is 120°.
Thanks
Let x be the measure of the fourth angle of a quadrilateral.
Sum of the four angles of a quadrilateral = 360°
80° + 80° + 80° + x = 360°
x = 360°– (80°+ 80°+ 80°)
x = 360°– 240°
x = 120°
Hence, the fourth angle is 120°.
Thanks
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