Geometry Practice Test 1

Question : 28 of 40

Marks: +1, -0

Three interior angles of a quadrilateral are 60°, 120°, 90°. The remaining angle in circular measure is given by:

Solution:

Sum of angles of quadrilateral is 2π.
∠A +∠B+∠C+∠D = 2π
60° + 90° +120° + x = 2π
270° + x = 2π

{3π}/2+ x

= 2π
x =

{4π-3π}/2

π^c/2

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